i just found out that the guy i like has a gf:/?

[Nika]

Does it seem as though he likes you from the messages?
A facebook post doesn't necessarily say much. They might have gone out but it's possible that they have broken up and never bothered to change their status. Her last post was 3 months ago after all (not that this confirms anything either).
Best manner of clearing this up is to ask him! If he says he's single then ask him why does his fb indicate differently. If they're together, then let it go and move on. Don't get in the way of anyone else's relationship. Just tell him that it's nice (so he wouldn't think you were too hopeful) and divert your attention elsewhere.
I met a guy in february and he asked me out. When I went on his fb, he had pics of him and another girl. The other girl's timeline cover photo was them together (lol). However, they were in fact broken up for months, though she wasn't over him hence the photos on display.
Don't jump to conclusions. Find out for yourself. We can only make assumptions and determine the possibilities on here. All the best!