Friends with benefits?

Lately I've been sleeping with a really good friend of 5 years. We have already done it 6 times in a little over a week (3x one night, 2x a week later then 1x a day after). I find myself looking at him differently now. And I know he's just in this for the sex. Was this a bad idea? We took advantage of the situation because this is the first time I've been single in a long time and am moving across the country in about a month. I could see myself having a relationship with him but I don't think he feels the same way (he said he doesn't feel different about our friendship). I'm conflicted.