I'm in relationship with a guy I love so much. I am sure he loves me too cz he always makes time for me even if he is busy and is always supportive of me. But the problem is he doesn't let me in his circle. He has lots of friends none of them I have met.we are in a serious relationship but I don't think they know how serious it is. They only know a little. Also another problem, he always change subjects when I ask him about his past r/ship. he said he will tell me when the time comes. He is open about literally everything except his past r/ship. Are all this red flags? Should I pressure him to tell