He still talks to ex fiancé

This guy I’m talking to still talks to ex fiancé. He says they still talk and text ever so often. I’m thinking do I want to get involved with someone who still engage with someone he was engaged with. They don’t share children or anything. I just don’t see why they would still be keeping in touch. I just don’t want to possibly get involved with someone who may still have feelings for another woman who he was engaged with. Do you ladies I’m right? Or any opinions really? In my mind I’m like yea idk about that. I just want other opinions or anyone else been in this situation?