I genuinely reported this because it’s got so many red flags that I thought it must be fake. Sorry, OP. So let’s look at all the things that worry me here, and maybe some of them are just phrasing sounding badly:
”another short-term relationship ended” - how often does that happen if you’re saying “another”?
”another relationship where I was in love” - how fast do you fall in love, if you’re constantly having short-term relationships where you’re in love ending?
”We were in a small argument and he got up to try to leave and I was really emotional, crying a lot etc” - Why were you really emotional and crying a lot for a small argument?
“Next day he said I blocked him from leaving and stood in front of the door… ofc I apologised and I don’t have form for this” - So you DID block the door? It doesn’t matter if he’s “bigger and stronger;” what you did was abusive, and you’re using the old abuser’s excuse of saying you’ve never done it before or you don’t have form for it
”it was just an emotionally heightened situation” - this doesn’t make what you did acceptable
“Is this fair?” - What do mean, is it fair? You crossed his boundaries, most people are going to agree you crossed acceptable boundaries, and he, appropriately, ended it. I would have too.
Note: I have had relationships with both men and women and the size of the other person doesn’t determine how acceptable or unacceptable my actions are. It would always be unacceptable to block someone from the door. If I did it, I would expect someone to break up with me. And if you were blocking the door after he made it clear it was over, you’re lucky he didn’t call the police on you (I would call the police before I put my hands on an ex, 5 feet 0 or not).