Relationship 2

Im scared. Yesterday he broke up with me then we got back together. A line keeps running throw my head right now, "if he can leave you once, he can leave you again."
I dont want that to happen. I love him. I dont know what to do. I feel like we are starting to drift apart. Im trying to not do anything to make him mad or sad but we have barely talked all day. My mind keeps thinking that what if he back with his ex wife, what if he is ignoring me because of that. I am gonna help him get his son from the state.
After all his son is the only one he has. Makes me feel like i really do mean nothing to him. But his son should come before me. Just like everything else in his life. I love him so much tho. I hope he knows that.