I've been considering cheating on my boyfriend?

If you're considering cheating, then it's time to break up with him. If he complains, tell him that you'd rather break your promise to stay than destroy the relationship and your self-respect by acting out because you're unhappy, and it's gotten to the point where you just don't see any other alternative. I do agree with the other poster, though: before you jump into a new relationship, you really need to address your attention issues and figure out what's a reasonable demand from a partner versus what stems from your own insecurities. I'm sorry your relationship with your parents isn't better, but you can't use them as an excuse for not fixing a situation you know isn't good. (Or rather, you can, but it's not going to do anything to improve your life.)