What do I do !?

So my BabyDaddy just moved in with his other child’s mother but still txt me still comes over once in a while and we still sleep together she says there in a relationship and he says that there not but obviously there is something going on because they live together now however I don’t feel no remorse towards her because when me and him were engaged she was sleeping with him and they had their son this shit is really toxic an I don’t know what to do he was the love of my life and I just can’t find it in my heart to let go I try to go without talking to him he finds a way to contact me or pops up at my house I’m so confused and it’s even worst cause I’m pregnant by him 😩 and because me and him just split up last September WHAT THE HELL DO I DO !?