Going out with baby’s father

My baby’s father and our kids are going to the zoo . I’ll admit sometimes it’s hard to be around him because when he is on his phone texting or goes to make calls to his girlfriend or maybe a girl he’s talking to i kind of feel angry and hurt. He says he’s single but idk. Anyways i guess i feel this way because he still tries to have sex with me and every time we meet to exchange the kids he tries to kiss me and most of the time forces a kiss by grabbing my head and touching me inappropriately. How do i just make our kids the main focus when we have family outings? And put my feelings to the side? I hate feeling that way because I don’t want him . I’m the one who left him for cheating on me so it’s weird that i feel this way.