Slept with my best friend but hurt he doesn't want more

I'D appreciate your advice on whether I should distance myself from a male friend who I've developed feelings for.

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We're both in our 20s and have been close friends for years. If I'm honest, I've always secretly fancied him and wondered what it would be like to date him, but I love our friendship, so I've never pushed the romance thing with him, plus he always has a girlfriend.

Anyway, a few weeks ago, after a drunken night out, I invited him back to my place and we ended up sleeping together. It was fantastic but, the morning after, I realised it was just sex for him, even though he agreed it was great and said he didn't regret it.