is he using me or does he have feelings ?

so this guy and i have been fucking for over six months and a week or two ago i told him i had feelings for him and he said he felt the same way. he's a year younger so he's pretty immature, so that's why it's so hard to tell if he actually does. but if he stayed so long he must feel something at least, right? even if it was just sex he hasn't gotten bored at all. the last time we fucked was when he knew i liked him then and after we cuddled a long time. i don't know i know i should just ask him but idk what i would say