AITA ?

I'm not the asshole. But for some reason everyone thinks I am. Today my om#ga boyfriend and I were at lunch together and he kept trying to hold my hand. Obviously, I wouldn't want to be seen in public being lovey dovey with an om#ga. So I slapped his hand away and told him that. He got really upset with me for some reason and starting yelling about something (I'm not sure what it was because I wasn't listening.) But then he tried to break up with me? This is why om#gas are stupid...... Before he could finish his sentence I broke up with him first. Then, I grabbed his arm and threw him in a dumpster. We both then went our separate ways. I told my friend about this and they said I was an asshole. People think I am in the wrong. Obviously, I'm not. Ugh.