Guy's Behavior

I had a one night stand and now he’s acting weird?

I’ve been knowing the guy I’ve had sex with for years. We recently got in contact and had casual sex three weeks ago. The next week he came over and we watched a movie and i helped him with some work but we didn’t have sex. This week i called him to see if we could meet for sex but he was too busy, So i responded”Ohokay that’s fine maybe l call you next week and we can meet up” and he asked me “you’re going to ask another guy to come over to have sex with you?”

And i said “no why?” And he said “because you said you’d call me next week to meet up “ and i said “okay?” And he said “yes you are i know I’m not the only guy you’re having sex with” then as he was hanging up the phone he said “go ahead and call the other guy and get ready for him to come over” then he hung up He is a new friend with benefits i knew him in highschool and we’ve had sex once and hung out once so he isn’t a long term friends with benefits

TL:DR; now i don’t know if I’m just overthinking but his response is getting to me
I had a one night stand and now he’s acting weird?
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