So I have been manifesting my ex back. I really want a new relationship with him not like we had before. We have been broken up a month now and I always thought it was a chance we would get back together.  I saw him Monday and we had sex big mistake on my part . Then I find out he's been seeing someone else he posted pictures on his social media page. I know that this woman is a rebound girl or maybe he was cheating the entire time we were together. But one minute he's cold towards me then we had sex.  When we broke up I didn't call him or texted even Monday when we had sex I have not called or texted iI saw the pictures yesterday . First I wondered did he do it to get a reaction out of me because I often told him it was never a sign that he had a girlfriend  on his social media page and then he post pictures with this girl .  I was so upset and feeling stupid but I still have not let on to him I know. . Want to get back aligned and I wonder and I just being stupid I love him and I want to reunite but bow theirs another person in the picture . How can i mean anything to him and he's with her. And how can she mean anything to him because he just slept with me.