I started dating this guy a while ago but we only went out for 3 weeks and then he started to date another girl who he really didn't like. Lately, he shows me more attention unlike before. We have only been going out for a week, but I want to be with him for longer. I am going away for holiday for an entire month and I want him to wait for me. What can I do to make sure he doesn't forget me or cheat on me? Please help!