What should I say to this?

I went on a date with a guy last night. He unfortunately does not live in the same state as me and was just in town for work. He says he does plan on moving here within the next year or so. Anyways I just messaged him telling him I had a good time and he said he had a good time too and that he really enjoyed spending time with me. I told him we should do it again sometime if he does end up moving here and he said he thinks so too and that I’d be the first to know. I really do like him so what should I say in response to this? Should I just give him my number? (We were talking through Facebook messenger)