Fiance is nervous to feed/change baby

Fiance says he's nervous to watch baby alone

He goes out several times a week and i start home with out 3 year old and almost three month old i asked him if i could go to a wedding and him watch the boys and of course it was fine but now that its the day of hes too nervous 🫠 I personally think this is his excuse for me to bring the boys with me so he can go out again tonight but its sooo frustrating. I haven't had time to myself in YEARS! Like i cant remember the last time i got to do anything kid free. How do i get him over this?! Like you wont know how to watch them if you refuse to ever do it. I am about to lose my fricken mind. I need a break every once and a while but he comes up with every excuse to not have to watch him own kids . I am so done!!!!!!