Am I wrong ??

So my baby father and I broke up after 3yrs of dating / living together , after 2months hooked up again an basicly picked up where we left off ..what I didn't know was  He got into a relationship right after ... I found out about a month after we started working on us again .. After I found out about her and she about me , me and him still went on and did us worked on our relationship
(... The reason we broke up was bc of money , we was poor / homeless living in a nyc shelter and I had just had a baby I left bc I had to do what was right for our son ...) He moved in with his new gf bc she was willing to support him ... Now it's been a year we are both in a spot where we can take care of oursleves and plan on getting back together (officially) this month ... He's still with her ( again she is aware of everything)  an pretty muc always knew he was coming back to me ... Was I wrong for not giving a fuck and getting my family back together under one roof .... Or should I have let that shit go ...