<human>: Could you distill the essence of the text into 1-3 sentences?

Facts:  
I'm male, straight, 20  
I broke up with W, 20, last August. We had a 4 1/2 month relationship.   She was my 2nd girlfriend, 1st sexual partner. I was her 3rd boyfriend.  
It suffices to say that it ended badly. Really badly.
                       
I tried the 'rebound girl' thing. That lasted 2 weeks.  
Last week, almost 4 months after the breakup I went clubbing, got drunk and basically talked to everyone about W. The strangers I met were pretty cool about it but seriously...

I need to move on.
Seriously move on.

I know the usual advice around here:  
lawyer up (no need)  
delete facebook (again, no need) 
hit the gym.

I replaced 'hit the gym' with 'go swimming' but I think there must be *more* stuff you can do to get over someone.  
More importantly, I am an introvert (i really enjoy spending time by myself) so how do I deal with this?  
Also, during the break up I said and did some really mean stuff. No, I never called her a bitch or anything but I was a complete asshole / I went nuts.  
How do I forgive myself for that?
<bot>: had gf, bad breakup, trying to get over it / move on / I wanna 'feel ok' in my own skin.