I need some advice IMMEDIATELY

So my boyfriend and I, well now (ex) boyfriend, were together for 4 years and we stopped talking for about 3-4 months because we had a huge fight and just chose not to talk to each other for a while (because of anger and hate) Well we’re only talking now because he messaged me saying “Happy New Year,”and he still thinks about me and such. Well my first instinct was to YELL AND BE ANGRY but I love him and I’m IN love with him (he’s my FIRST love) so I of course fell back in to his arms, but we talked things through and decided that we should stay single until we’re sure we’re ready to be committed for sure. So long story short lol we’ve been having sex and still express how much we love each other but there’s days where he’ll show he loves me and that he actually cares for me but then there’s days (like today) where he’ll brush me off and barely text me or ANYTHING!!! And it makes me upset and cry because I DO express how I feel to him and he treats me this way.

So my question to you guys is, should I just move on from him, just be strictly his friend and stop hurting my heart for him? Or is this just a part of not being together and I’m overreacting??