Is this a reason he won't want to have sex with me again?

this guy and i have been hooking up without commitment for the past two years. the last time we had sex (2 weeks ago) we talked about all the positions we wanted to do, then he came during the first one. he looked depressed like he was going to cry so i kissed him passionately on the cheek, told him it still felt good & i suggested we "have more fun" tomorrow. he kinda snapped and said "i'm just tired!"...i like him & i don't want to lose him over something stupid like this. do you think he'll never wanna have sex with me again now? thank you!