Self sabotage

Hi everyone,
I have been with this guy for a couple of months and things are going ok. We have known each other for over two years. However I feel that I am self sabotaging or paranoid. I feel as if he is playing with me and I don’t know why. I find myself thinking if he is not talking to me then he is talking with some other chic secretly. When he is on the phone with me and I hear his phone notifications go off I automatically think it’s another woman he sneaky with. When he doesn’t call me back like he says he will my thought go to him sneaking around. Lots of times he says he fell asleep but in my head he is lying. We hang out when we can and when he doesn’t have his young child with him. He has broken my trust before and I told him we were leaving that behind and starting new in the new year. I don’t know if it’s insecurity or what. But my thoughts are negative when it comes to him. He is sweet and likes spending time with me. He randomly bought me flowers the other day he told me to come outside and he had two dozen roses for me. Literally after that I thought why did he give me these and what did he do. Lol omg I feel crazy typing this now but I guess I’m venting my crazy thoughts. I literally make up scenarios in my head and I run with it and believe it. I pray that God will guide me and help these thoughts. Some of these thoughts I feel come from me not looking at my self as worthy enough to receive real love. If it’s not real, maybe I will know for sure of an actual sign that it’s not real. Should I leave or should I relax and be happy and IF something happens I leave and if not I just continue my happiness with this man? Sorry for rambling.