Advice Please

So I started talking to this guy, he is currently separated and has a child with his wife. He tried to get her back, but she said she no longer loves him. Him and I met on tinder and have kind if really hit it off. We've been talking for about 3 weeks now and he came (2 hours) to see me and stay the night. I have yet to tell him that I am moving 3 & 1/2 (more) hours from him for school in a little over 2 months. I know I should tell him, but we just started and things are going really well amd I don't want to ruin what is just starting...