How would you react?

I been with my boyfriend for over a year. We even talked about marriage and even tried for a kid for a while too because everything was amazing and we were talking of moving out and getting our own apartment and all. Well stuff got worse and a lot of fights have been happening. I accidentally liked a guys tweet on twitter about relationship quotes. I didn’t even see it was a guy I was scrolling down reading tweets. He lost his mind with me saying quote for quote “Another guy would’ve cheated on you by now” and it nearly broke me. I cried so hard I felt pressure in my head and was gagging nearly puking from being so upset. He told me he didn’t love me anymore, and he lost feelings. I say there crying and he’s like oh itsyour fault you always liking guys shit and I told him I don’t. He knows I don’t and has my passwords to everything. I don’t even have guys on my social media for him. Then he tried getting me to do sexual stuff to me after saying a bunch of mean shit and I pushed him away and left. I’m so lost and if anyone says leave how do I do that when I felt like I was going to marry him and have everything with him. We see each other all the time it would be the hardest thing. It’s always my fault. He has nothing on me because I never hurt him, never cheated, or lied. So he tries to have stuff on me. Please no rude comments this is very rough for me...