Helpppp ☹️

So I’ve been in a 3 year relationship and it hasn’t been easy. Lately I’ve been asking my boyfriend for his password and he hasn’t been giving it to me I have been asking for his passwords for months. I used to have his password and we broke up for like a month or so after that I never got his passwords back. I have been asking if he had cheated on me what is he hiding he keep saying nothing. I’m trying hard to believe it but for some reason I just can’t the only way I feel like I’ll believe him is if I go on his social media...

Can I get some advice