All right so there r three boys how am i suppose to pick?

The first is a crush Ive had for several months now.He just started seeming like he might be starting to like me.
The second is one that has seemed to have an interest in me for a few months but he isnt tied down so he flirts with alot of girls so its hard to tell.I like him aswell.
The third Ive been good friends with for a while and recently I can definitly tell likes me.

Ok so i kinda feel pulled in to many directions to think strait.they r all awesome in there own way.I cant ask any close friends cause theyre advice might be warped by how cute one is or if they want another
number one and number two went on vacations this summer
giving me way to much time with just number three

Im afraid if I commit to number three while they r gone the other two will come back wondering what happened
How did I get in to this mess
how am i suppose to choose without regretting it when the others come back?