We love each other but it's getting complicated.

Me and my bf are in a relationship since 4 years. We both are students so we have our struggles. The first few months were great, new love, new everything. But then it began to get complicated. He wants to make new friends, he likes to know about people and that's a good excuse he use whenever i ask about any girl in his contacts or following. I trust him that he won't get physical with them but I don't trust that he won't flirt with them. It's not just that he had done it in past, I've done it too twice but he doesn't even apologize, he just found a way out of the argument. He says he's not sorry as it wasn't a serious flirting and his this behaviour has turned me into an insecure gf. We are in a long distance relationship since covid hit. He's in a college, I'm still struggling to get into a med college. And to be honest i don't know shit aboutwhat he has done in past two years. I only know what he tells me or what i find out through his friends. Even those stories are well explained by him. We even fight on special days like birthdays. He doesn't fell it's important to wish anniversary when the clock strucks 12 or he doesn't feel that valentine's special. I mean not anymore. I ask him to do little things and now I'm tired. I mean i literally have to beg him to talk to me somedays. And he says that I've to attend a class you won't understand, even though he has time to go out with his friends. Sometimes he lies to my face. I've anger issues but I've learnt to control my emotions because he asked me to but he hasn't changed yet. Whenever i get too tired and i asked him to go...he says that he will change, he will be there but after two days it's back to normal. Whenever he asks me to break-up, i become weak and i choose to stay. He knows that i won't go away. I don't know if I'm being too much insecure or if he just wants to have fun. He says that he wants his freedom, that he didn't know what a relationship does to one's freedom and life because if he knew he wouldn't have asked me out. He says that he finds it difficult to share something with anybody, says it's from his childhood. He doesn't like to be held accountable. He doesn't like to be questioned. He doesn't want me to ask him about his daily life. And i love him and that makes me weak. He tries sometimes but one fight and that goes in drain. He even lied to me about his birth date. He said he wasn't feeling secured enough to tell me his actual birthdate at first and now after 4 years when he's in college he said he felt like it's time so he told me. I mean is that even a reason. I don't know what to do, all in all he's a nice guy but he just doesn't want any responsibility. He says that this age is for fun, freedom, to be wild. I mean if he wanted these things why did he came to me. He knew that I'm a girl who believes in true love disney shit. And now he's doing this and it breaks my heart.