<human>: Can you succinctly summarize the text in 1-3 sentences?

I am 22M and recently single for the first time in a long time. I was with this girl for over 2 years but was with someone else before this I've never done the one night stand thing. Not fully sure what the best way to get "back out there" so to speak.
If I am honest I miss having someone to be close with. And if I am really honest I miss sex. 
Most of my friends are in relationships and hard to get hold of for nights out. I am pretending I am happy when people ask but I am getting lonely. Any advice?
<bot>: (22M) haven't been single for years. Needs advice on how to get meeting people just for fun and not feel guilty about it.