Well if he pays less attention to you that's a start. If he's the kinda guy whose always on you and then all of a sudden he doesn't care what you do that's also a sign. Yet if he becomes extremely paranoid about what your doing, more than normal, than that's also a sign he likes someone else. If he doesn't answer your calls or texts when you think he's up to something... he possibly is.
He Doesnt Stop Texting You Or Wanting To See You GO FOR IT BABE. :]
If he chooses to hang out with you over her, if he complains to you about her, if he is nicer to you than he is to her. There are also a lot of varying factors.
When he has a penis.
iam in love with this guy but i do not know if he likes me or some other girl
If he likes someone else then it's doubtful he would date you. If you really care about him more than just a friend then you should let him know.
Have someone else do it for you.
He just wants to let someone know about his relationshipical feelings... But he also wants the person he likes not to know... yet...
Find someone else, he's a jackass.
Friendly people often smile at others because they are polite.
find someone else to like
You can't really know but if it matters then he may not. If you like yourself then someone else will too. If you have to ask then you will never know!
It means he wants someone else but is flirting with you as a second resort if the person he likes doesnt like him back
Not sure how you expect someone to magically know something.
To make this guy jealous, of course.