What kind of reading are you looking for?
Astrology? I would suggest posting your astrological data.
Psychic? It's hard to find a reputable one online. I have some psychic energy that can blow me away sometimes but nothing I can depend on all the time.
Tarot? Looks to be a few members who do this..so maybe ask.When I first read your question, I thought to myself, Why is she asking this question? This isn't good sign. Maybe you should be discussing your worries with him.
When you say he left his ex for you, do you mean, you guys connected, and broke it off for you? Did he cheat to be with you? Is this the reason for your concerns?
He's asking you to move in with him NEXT WEEK. Did he ask all his exes to move in? This to me is a huge sign he's serious but who knows. I would discuss how you feel with him and I would see something as moving in at the start of a new year as something to look forward to and enjoy rather than worry about his past.