should i move on or keep fighting?

my ex boyfriend and i have been broken up since august of last year but have continued to see each other on and off and im so confused. (24f & 22m)

the main reason for us breaking up was due to him cheating while away on an internship in another country after visiting him and everything, he was constantly lying and sneaking behind my back even for things he didn’t even need to hide from me.

after a few months we met up again and we talked about it and he apologized (he has a hard time expressing his actual feelings) so it didn’t really feel sincere. but i decided to believe him because i loved him so much so then we unofficially got back together (in secret)

now he just kinda acts like he doesn’t care and he’s super nonchalant and doesn’t answer my texts or calls often (i’m not clingy but i also hate being ignored) he also every once in a while will try to break things off because he “doesn’t think i’m happy” and he “only hurts me” and “thinks we’re not good for each other” but then he’ll say he loves me and wants to be with me and i’m the only girl he wants. is there an underlying truth that i’m not seeing?

i don’t really think we’re bad for each other at all. sometimes we fight and argue but the arguments are just about his treatment towards me sometimes. because sometimes he’s super charming and funny and we make each other laugh a lot and have good conversations but then he’ll switch to being cold and careless and that makes me feel upset. but despite the bad (which isn’t all the time) i truly feel we’re good together and our chemistry is good and that we’re meant to be together but im not sure he feels the same. what are your thoughts? do i just need to move on or should i continue to hang on?