My ex says that he has changed... he's grown up, and wants me to give him a second chance. I don't know if I can though because we had been talking about getting married and then he left me. I don't know if I can stand the heartbreak if he leaves again, but I know that I still love him... what should I do? Do I give him another chance, and risk another broken heart, or do I say no, and go on without him, and keep my heart safe?