When he says he is straight

So we started seeing each other a few weeks ago, and everything was going great. However, he told me yesterday that apparently he is doubting his sexuality, and feels that he is straight, even after being out and gay for 3 years. Not really sure what to think, feeling pretty crushed by it as I'd had a crush on him before hand and apparently he'd had one on me as well. Any suggestions as what to do?