Please! Need your opinions??? Saw this on Facebook and feel down?

[Alias]

We are 19. He and I have known each other for half a year and just recently moved passed being friends. He asked me if I was into him and we both are. He's never had a gf before, he isn't a player. He is a good guy. The thing is, he's out of state for like three weeks with his family working for something. I haven't talked to him really and as he isn't coming back for two weeks, it makes me miss him. Tonight I saw him comment on a girl's pic on Facebook "that's freaky" and she had on only a swimsuit and short shorts and was like posing while sitting down while flipping her hair. Idk, I just feel shitty after seeing that. She lives down by where he is visiting, not the same state so I don't even know if they see each other. Seems like they have been friends, they are friends with the same friends. Her best friend is one of his good friends. But it doesn't seem like they converse anymore but then I saw that and idk. Girls always jump to conclusions :/

[Lifeline]

girls have a great system to detect falsehoods/lies---intuition and it does work so its choice how far you want to go with this guy---"known each other for half a year and just recently moved passed being friends"