Oh my goodness.
Stop being so bloody insecure. He sounds pretty reasonable to me, the fact is - he's going through a DIVORCE. His marriage didn't work out and it sounds to me like he doesn't want to go through another big break up, so he wants to make sure whoever he spends a lot of time with - they're going to be worth it.
If you don't trust him, then why are you even with him. Seriously.
To love is to suffer. To avoid suffering, one must not love; but then one suffers from not loving. Therefore, to love is to suffer, not to love is to suffer, to suffer is to suffer. To be happy is to love; to be happy then is to suffer, but suffering makes one unhappy; therefore to be unhappy one must love or love to suffer or suffer from too much happiness. I hope you're getting this down.