Me and my ex broke up a month ago. I dumped him because I saw he was getting close with another girl. Then we got back together and he said he missed me so much. 4 days later he dumped me and said he doesn't have feelings for me anymore. The other day he popped up and asked if I've been seeing anyone and that he asked because he doesnt like thinking about me having sex with another guy. Yesterday I found out that he has been seeing this girl who I was worried about. He started seeing her 2 weeks after the split but he claims that it's "nothing serious and we met up as friends and it just happened". Is he on a rebound or is he moving on??