Can't sleep to much sh** going on

I always get my self in stupid guy situations. for one i was fooling around well not really cause he met my family and we would go out talk on the phone till we both fell asleep and would hold hands and what no..ugh im getting of topic so him lets call him Bob so noone knows who im talking about well we stopped "fooling around" cause i found out he really was fooling around with one of of our supervisors and well we stooped talking for awhile then we started talking he looked depressed and all at work so i decided to talk to him again at a staff party well everyone at our job assumed we were dating and broke up and got back together. Well i wanted to be his gf but he would say he wouldnt be a good bf (ths was before i knew he was fooling around wth that other chick) well now i know why he wouldnt be.

well any who we stayed friends and i still like him but we just didnt hang out as much anymore but still would kiss and hold hands when we work together. on halloween he had it off and i worked till 11pm i told him r u going out hes like no im going to sleep i felt bad cause i went to a party and was drinking and flirting with this one guy that i knew liked me well the following week i see pics in his facebook of him dressed up (when he said he wasnt doing anything cause he didnt have a costume) and almost making out with this ugly skinny asian chick

i asked him about it and he's like no that wasnt halloween and im like fine whatever and yestrerday i saw the picture in her pg of them actually making out i ask him and hes like no we're not going out and she has ablog that is dedicated to their love and relationship

i asked him today do u have gf and hes like no

should i get even with this guy? if yes how? my head goes blank on how to deal with this