SUBREDDIT: r/relationships
TITLE: I'm [20/M] having trouble moving on after breaking up with my ex-gf [18/f]
POST: Hey, what's up guys.

So basically my gf dumped me like 3 weeks ago.  We only dated for like a month and a half, and I thought I was fine at the time, but then some other home/personal issues came up, everything sorta "hit me" at the same time and I got mad depressed, start drinkin' quite a bit, sobbing to friends, shit wasn't pretty.

I'm feeling a lot better now than I was then, but a lot of things are still bugging the hell out of me.  So I saw my ex at a party and we danced for a bit, now we are snapchatting on and off.  The problem is we go to a very small school, and I literally can't go out to a party with out seeing her.  And usually when I see her she's necking with some new dude(s).  

My original intention was to try and set up a FWB situation (since that's how our relationship began anyway) post-breakup. But now I think, having gotten so steamed about seeing her swap spit with other guys, that I might not be completely over her emotionally.  

I've tried to start seeing other people but my self confidence is a bit in the dumps right now and there's not that many awesome girls at my small ass school.  I mean I get really heated seeing her with other dudes, but I think it's jealousy more than anything else.  Its just so easy for her, being a good-looking chick to just dress up nice, go out and hook up with whoever ya want.  Meanwhile I'm just some pathetic lonely ass dude.

Is it bad that I feel like this?  I see her hooking up with dudes, and I just think "hey remember when we did that? That was awesome.  Now look at all these other dudes having fun and not me."  It just makes me feel so shitty inside.

So trying to set up a FWB thing is probably a bad idea, eh? I just feel like everyone's having sex, and I'm not.  Is that fucked up?
TL;DR: 
Feeling all sorts of confused/pissed/jealous after gf broke up with me, am I being ridiculous?