The Last Decision

Hello everyone! I wish you a great morning I'd like to talk about a problem I'm suffering which I can not think for myself anymore. I'm 19 years old. I have been in a relationship for 3 years it's my first relationship ever (and last I hoped) Firstly I knew Anne (My girlfriend) through a friend of mine who was her BFF and mine too and he was like there's some cool girl you need to and such and told her the same and we hanged out together the 3 of us.. It was an amazing day I felt extremely attracted to her looks, personality etc but I've been always a kind of guy that like falls fast but I've never been hurt cause mostly girls I liked (or fell for) had what I called major flaws that happly turned me off and made me turn away easily.. Back into subject I went to sleep that day and I dreamt of her and I woke up hugging the pillow I woke up feeling happy feeling LOVE for the first time in every inch of my body.. I asked my friend for her number and he said she wouldn't like it and we need to be closer (He didn't want us to get to know each other more so he feels like "in control".. Anyway days passed I managed to get her number without him knowing we we're texting everyday and every minute.. Every message she sent me made me happy.. I felt sad that we had to go sleep and go to school because all I wanted to do is talk to her.. Days pass lots of problems happen to her including a time someone tried to sexually assault her but luckily I was nearby and I had a force which I never knew existed within me as I almost killed the guy and I stood by her side and one day I chose to tell her I love her after my friend (Jack who introduced us) got involved and he called me saying if I don't say I love her he is going to tell her that I love her and I'll look like a pussy etc etc.. After I told her that I love her she was skeptical she thought there was something wrong and didn't believe me.. Spent all day crushed feeling like a worthless piece of shit suddenly my phone rings ohh she is calling me, I don't answer. She calls again I answer she says she loves me so much but she thought I didn't because I didn't tell her earlier.. Days pass the most beautiful days of my life hanging out joking all the time everything was perfect that I didn't believe it.. Not for so long life respondes to me.. She had problems with her family and because of that she failed an exam and had to go summer school she became semi depressed and I couldn't reach her most of the time because her family put too much pressure on her that they actually took her cellphone.. Days pass situation cools down I go to her house everyday to help her study in my summer vacation until it was the exam and she did good and succeeded (Since she failed the exam and became semi depressed she became so mean to me saying a lot of bad things that didn't even exist in my personality but I didn't judge her as I was the most person knew what she was passing through).. After exam she is still affected by semi depression and things become better for a while and then everything becomes shit again with one of her far relatives moves in the city we live in and they hanged out a lot but he fell in deep love for her (Her parents didn't know me and her were in a relationship) so he brings her flowers and gifts everyday as he used to steal things to sell for money and her more gifts.. I didn't know what to do I was breaking the jealousy was tearing me apart.. I decided to act smart no hard feelings congrats on your gifts etc.. One day i wake up on her call she tells me that her relative made his parents talk to hers and tell them that they should get closer as he loves her and has hopes that she becomes his future wife.. And her parents agreed to that(She didn't agree and they wanted to convince her by force) . At that moment every fucking cell of me was torn apart I do my usual role be calm act smart.. Problems happen when he figures out that we're in a relationship and he ruined the party I made for her birthday and her birthday party was the worst day of my and her life.. He takes it to next part telling her parents that their daughter was fooled by a drug dealer (me) etc etc So I decide to act fast and I went to meet with her parents talked to them and made my family talk to them etc (My family is wealthy and well respected) and everything becomes so good that her parents wouldn't even allow her relative near her and they trusted me and everything was soo damn good.. And again this was the hardest hit.. I knew she was in a relationship with a guy before me for a few months he didn't treat her well cheated on her and called her names infront of his friends and quite a lot of other stuff.. Well suddenly he died.. I don't know how I feeled I feeled happy that he wouldn't be close anymore as he also tried to get closer to her before his last days and caused problems between us.. I was happy.. SO HAPPY.. And she? Well she was completely destroyed she was crying everyday non-stop and she expected me to be with her like usual which I tried to do in the beginning but O couldn't handle her crying over her Ex every single fucking day every single fucking call Everytime we hangout happy and everything she suddenly starts crying saying rip rip.. So I finally blew out and I was like if you ever think about him or cry about him or mention him infront of me again I'll not let it pass and I said things I knew I shouldn't but at that moment I didn't care.. Anyway later on we forget she forgets and suddenly these days she remembers him again same crying and now making his photos her Facebook cover and tweeting things about him which pissed me off like hell I was like finally she forgot and finally she stopped her depression because of him etc and we are at it the biggest downfall right now.. I don't know what to do... I'm hopeless.. I'm starting to hate every single detail about her that specialized her and made me love her in the beginning I can't forgive her I can't handle anything at all

I'd love to hear your advice.. Sorry the post is too long I wanted to give everyone a background about me and about everything. It'll be really appreciated if you can give me advice (Don't judge on any decisions I took please I just need help.)