<human>: Can you condense the text into a few key points?

I am an early 20's guy and I have a hard time being social, mostly because I no longer like to get drunk.  It seems like I am an outcast because of this.  I feel like everyone around me loves it and it is what they look forward to at the end of the work week.  I used to feel this way, but not anymore.  I am slowly becoming more and more introverted, and prefer being at home to going out and doing anything really.  Because going out requires drinking to most.  It is expensive and I do not like hangovers or making an ass out of myself.  I just lost my girlfriend of two years and I feel that my introvertedness is a major factor.  I quit drinking at first because it caused problems between us and after I quit it still caused problems...I feel like if I don't start going out and drinking and being more social that I am going to end up very lonely.  I don't even know how to begin trying to find a new girlfriend because the only thing girls my age like to do seems to be "go out for drinks."
<bot>: I don't like to drink and the fact that that's what society thinks I should do is turning me into a hermit