How do I trust and move forward with my boyfriend who constantly accuses me of cheating?

Hii sir ! This is ritika and I love a boy and we are in relationship since 7 years but there are some behavior of him he always have doubt on me that I am dating another boy he always says that start you screenshare in WhatsApp I even do because I don't want to lose him and he saw all of things of my phone yesterday he again asking for that and I do and there was a tab of instagram which was belongs to my roommate it was her I'd open in my chrome browser where she only wants to delete the I'd which she did from my phone these instagram thing happened approx one year ago but when he saw this I told him that was not mine but he continuously said I am cheater I cheated with him again he was like I know you have two mobile phones and you cheated with me. I love him soo much but he cannot try to accept that . Even I don't talk to my male classmate because he didn't want ki main kisi boy se baat karu Is it fair , am I cheater ? I love him unconditionally I support him in all his career or decision but again he was like I cheated with him we are in long distance relationship but I can't cheat him . Literally I am feeling depressed ????

hi maam im 24 years old im from mumbai im in love with a guy who is from hyd and he is 28 years old we have been together since 1 year when i was in hyd he did many things which hurt me like falsely accusing me of cheating with my collegues who are elder to me coming to my office and fighting over there calling me nd abusing me but i let go off everything he did with me and he did many more things later we started to b in a long distance relationship he use to always say lets b good with eachother from now and lets forget our past but since the tym we r in long distance still he always accuse me of cheating and lying even when im saying the truth i never cheated on him even once and never even thought about it but he always accuse me of cheating always and everyday and since some days he is always behaving hot and cold with me im not able to understand anything this last sun he called me but i didnt lift the call due to some issues in my house so i called him the next day and he started to accuse me of cheating and lying when i was telling the truth i wanna leave him and move on but when ever i leave he comes back again he leaves me again he comes back im not able to understand what should i do now