Sorry man, Aikido has failed time and time again when compared with other martial arts as a scientific control. I'm not saying all aikido is bad, but the training consists of dead patterns with no resistance, thus leading a practitioner to believe his techniques work without having actually achieved any of them on a resisting opponent.
If you have evidence of a more effective aikido being applied against resisting opponents, please share with us.
btw OP what was your impression of those boxing travelers? if they where actually boxing. Go ask a local doorman, find a smallish one and ask him what he thinks will work good. The best IMO will be kickboxing (or MT) crossed with some grappling art like judo, or wrestling or BJJ. Boxing will do great too if you are not inclined to kick. You need to stick to it though for quite some time before you see significant difference.
On a side note, you are very young, and as such, stupid. You keep fighting like that you are going to get into trouble. Either violent trouble or with the law. BTW take your small friend with you, the one that gets you both into fights. He needs to start taking care of himself better.
Again read more of the threads on this site.
This one is relevant to you:
Also try this one:
Then search others pertaining to aliveness.
Indeed. The only people I've ever heard sing the praises of aikido are either aikidokas (is that the correct term?) themselves or people who have never done martial arts who watched an aikido demonstration somewhere and thought it was real.