How do you know if a guy likes you?

Just wondering...
What are clues to know if a guy likes you?

At thirty and you still don't know? It's okay. At this age, men are much less obvious about showing their interests towards a woman. It's also much easier to find out though. As we get older we become more mature allowing you to simply approach the guy whom you are interested in and ask if he'd like to go out to dinner with you sometime. Make sure hes not in a relationship before doing so to save yourself the embarrassment. Don't be hurt if your rejected by him. Just a hit and miss, theres more out there and thats the beauty of being a mature adult, we don't sit and cry over rejection. If your just wondering what signs there are of a guy liking you, it's always gonna be him staring excessively. we just get better at not getting caught as we get older.

well how i allways know if they say they can trust you and when you are on your own it feels like he is watching you and well if you kiss he dont pull away ..x