Please jst help me!

Heyy..so I just want to open up and seek your point of views about my friendship..

So there was a boy in my school and we were busmates also. We also live almost near each other. In bus we laugh together enjoy together. He was a playboy but he start bringing me choclates , always sits behind me , whenever I ask him for his phone he give me . This treatment was only given to me . Other girls were also in bus he talk less some were his sisters but he treated me differently. When people in bus start shipping us together I fall for him i don't know he ever fall for me or not . Then he proposed a girl who was my friend's friend. She rejected him because she was committed. Before her he had many relationships, he was not serious at all. When girl rejected so he start doing drama so I supported him cared for him then he find another girl because of that girl we had some misunderstanding and we stop talking to each other. Before in bus we also fight and don't spoke to each other then we start talking again always. So after that misunderstanding we don't spoke for a month then he come back again we start talking again that misunderstanding was cleared. He was still in relationship with that girl. After talking a month we became bestfriends it didn't take any long time because we had known each other for so many years. When everything was going fine he had breakup with that girl i don't know the reason. He always cry to me i was always there for him. But to be honest that was just a drama by him and while knowing it I still don't say anything after 2 months of breakup they got back together again . He did not tell me because he said he thought I put lot of efforts to heal him and if I got know he is with her again it will hurt me and yes it did . I still didn't get mad at him . Everything was going fine but then after a month it was my birthday and gues what before a day from my birthday I talk to him . We were talking Nicely about party etc then on my birthday he did not wish me . There was just a message saying " HBD in advance, sorry I can't wish you" which sended by him before 30 min when the birthday starts. My birthday become worst birthday ever in afternoon he message me "happie bthdyy ...." I complained that "why you wished me now "and he said "oh it's okay" after that I never message him . Again we didn't talk for month. Probably the reason why he didn't wished me was his girlfriend. And you know what they were not loyal to each other just passing time. After a month he messaged me i start talking again as he brainwashed me from his lies. After a month it was his birthday and I sent long paragraphs and a photo frame and chocolates as gifts. Everything was going fine then don't know why after 4 days he blocked me . I didn't get to know any reason. After 10 months it was my birthday and he wished me . He also said he missed me. That birthday was good. Next day I said him can you please talk to me everyday a little I also missed uhh and he said "fo you want to come close again" i said you want to leave again and he said he just wanted to wish me. So I let him go . And after 2 months it was his brthdy I did not wish from my main I'd but send a wish where he blocked me so obviously he didn't receive it. After few days when he was talking to my sister he mentioned that he want to talk to me so after lot of thinking i decided to talk to him to ask the reason why he left. They when I start talking I get to know that in school there rumours of us being together so he did not want to make bad image of him. He said back than what he thought what is good he did that. So now we are again bestfriends and i earlier I changed my school . We are just bestfriends now and don't meddle in his life like before not I say anything if he talk to another girl. Remeber the first girl i said he proposed my friend's friend . So my bestfriend said that recently that girl always look at him so he said ask that girl what she mean let the confusion be cleared. She became my good friend back then so I texted her and I asked randomly if she want to be in relationship with my bestfriend and after saying just few words she agreed. Now they both talk to each other just as friends now later he will propose to her . They both are not serious the girl had breakup a month ago with a guy she loved . So he talk to me less or maybe I overthing. I don't know what to do...means I still have that fear if I loss him again

So I just want someone's advice about my situation if I did anything wrong or what should I do in future. What should I do if thing turns out any wrong