Guys are interested in a number of different things. It really depends on the guy in question. Some guys are interested in reading, school, and women, while others enjoy Video Games.
If he is your best mate, you should be able to just ask him. He can still be your best mate if he is interested in guys.
Why not?
Harmones
Breasts
Guys don't play hard to get. If he's acting like he's not interested in you, either he's legitimately not interested, or he's embarrassed to admit he's interested in you in front of his friends.
it could be ther Anonymity easy, guys are always interested, internet or not
Bio sexual
you know when a girl is interested in girls by the way she talks and acts. and by the way she treats the guys. if she pushes away the guys is cause shes interested in girls, you might sometimes find them staring at others girls(checking them out)
There are some guys different from some other guys there are some that are interested in sluts and ones that accept you for just being plan old you ,my advice if you like a guy who is not interested in you, don't change for him.EVER!!!!!!!!!
Girls that are ignoring guys they are not interested in think it is more polite to ignore them than to have to explain they are not interested in them. They would rather not hurt the feelings of the guy and by ignoring them, the girl hopes the guy will not speak to them.
Because all the guys they were interested in were stupid
Only on the weekends