How to get myself out of the casual situation I put myself in?

Will try to make it as short as possible

Talking to someone for 7 months before having sex

Out of fear of a relationship/rejection told him I wanted to stay casual with no strings after we slept together

Next visit, we keep is as “booty call” as it can be

Realised after I have deep feelings and regret it. Now he’s treating me casual I’ve realised how intense his feelings were beforehand.

Have I fucked up my chance for good? Contact is down to nill, bar the “are you free”

Feeling sad lol