Hey as you said your young still, so you have plenty of time to sort yourself out. I was same at your age, had this 6-4 130kg drunk walk into our party and pick at my brother. Pushing and shoving him leaning on the car with this huge bottle in one hand. And I've got issues with drunks because my stepfather was a violent alcoholic prick. So i pushed towards his bottle to get it out of my face and he let one fly into my chest. What would you do?. You try and block and fire one back. What made me feel bad was he went flying down the driveway and in this time my brothers friend flew under my arm pit tackled him lifted him and placed 6 blows into him. Still to this day i feel bad it went down like that. See the one on the train isn't your fault. Sure you might have thought he was doing evils ( he might have been) but he pressed the situation by getting off and coming to you. He could have just let it go but didn't. You clearly have some self control or you wouldn't stop in the middle of a fight and walk away. Use that and you will be so much more happier. And when people look at you now think this. It's not because your big, it's because they think your better looking now . Took me sometime to understand people weren't looking at me because i was the size of a double story house with extensions. The last person that gave me daggers i said Hi hows it going, and they **** lol. See it's been so many years since i used public transport. And in june im heading into the city 4 days a week for 3 months and i will use it night and day "no car-parking" so I'm going to get a taste of it first hand. So much of these comments are helping me.