There is a book that has been out for a couple of years now. It's name is, "He's just not that into you", I know the title sounds harsh, but the advise in it is really, really, good. I saw an advertisement on TV the other day saying the book has recently been released as a movie. I think it is a comedy, however, I don't think the subject is funny. Get the book, it will help you decide who you should and should not get involved with.