So my the guy I was in a relationship with decided he wants to work things out with his ex. It took…

So my the guy I was in a relationship with decided he wants to work things out with his ex. It took a moment to warm up to him bring around me and kids. Then I let my guard down and let him be apart of our everyday lives. He decides to be back with her because they have history together. What a freaking slap in face. It is already hard to date being a single mother with two kids. I cried mostly because I felt so stupid to fall for him. Then my son's dad told he knew it wouldn't last. That I shouldn't have allowed him around my kids. That the guy never really wanted to be in a relationship with me he just wanted sex and used the kids to get in good with me. Sometimes I feel I meant to be alone. But loneliness sucks no one wants to alone for the rest of their life. Rant over he is lost not mine.