I'm going to suggest a curfew for my boyfriend
Why are you suggesting a curfew for your boyfriend?
I want to control what time he comes and leaves the house.
You should not control your boyfriend. If you can not trust him then you should not be with him.
It's a trial, my ex cheated so I want to make sure he's loyal to me.
If you have to restrict your partner to certain freedoms to have them remain loyal to you then you are trying to hard. You partner should remain loyal to you because they want to. Your job is to simply be the best partner you can be.