Do long term non-commitment rs works?

this is kinda serious (my life kinda depends on this) so I've been with this guy for like 7 months now, he met my family, like he's always in my house, and obv, i fucked him many times... been on a constant date call each other couple call sign but yeah we aren't dating... but like on our 4th month tgt, i asked him if i can be his boyfriend and he told me, "i wont answer it yet, but yk, it doesn't mean a no" which i am kinda glad 'cause financially i aint ready to feed him

and he told me he's kinda worried abt how would his parents would react, as we're both still financially dependent on our parents, and he explained to me that we wait till we graduate college at least

but the thing is ive been constantly overthinking about it, if we aren't on an actual committed relationship, does that mean he can just leave me any time? i really love him, and for me (mentally) we're married