Boys will come and go, so just appreciate and take advantage of the time with whoever is in your life right now. If they leave, let them. If they come back, that's even better. Yes, it will hurt that they are not like the other, or are not the other person, but it's also good to have someone new to help heal the pain of the ones we just lost. Just keep taking chances and forgive people, because no one's perfect, and whoever is meant to be in your life will eventually stay.