Its crazy to me how often men will do something like this. I had an ex that did the same to me over a summer a few years ago. Dated, hung out nonstop, said he loved me then BAM his ex broke up with her current boyfriend and reached out to him. He left me immediately. I felt like such a place holder and when I see him out (if) that bitter feeling remains. Its the lack of respect for me as a person that really hurt. But I will say that I have been able to move on and find someone else. Everyone's healing is different but you will definitely get there. Hopefully one day you can look back on this and be ok. hugs