Would this hurt you?

I have what I believe a great relationship with a man a truly love. He seems happy with us and when I ask he doesn’t want us to split up and wants us to be together. He is very caring and I am happy with him BUT, he is secretive and very flirty. He knows I don’t like secrets, yet when he hears from his ex he doesn’t tell me. When I ask him why he flirts he says he does it for a confidence boost, but I tell him I love and want him all the time and I mean all the time. Is this enough for him? Am I not enough for him? He has been hurt in the past, do I have to pay the price for that? He has never said he loves me, is this why he does it? I know I am going on with this, but I just don’t understand what is happening. Does he want me or not? Sometimes I think he does then when I find things I think he can’t do this or keep this if he really did want me.