Relationship crisis

So me and my boyfriend have been dating for about 3-4 months now and everything was perfect at the start, he would text me saying good morning and goodnight everyday without a doubt, give me compliments, always smile at me around work (because we do work together) used to always hug me if I was feeling down. But now it’s like he doesn’t want to know me and I feel really insecure, he doesn’t compliment me anymore only when we have sex, he doesn’t text me because he’s ‘grown out of texting’, now at work I feel like shit everyday because he looks depressed and it just leaves me thinking, does he actually want to be with me? I love him so much and really really don’t want to let him go, I’ve told him about all of this and he just says ‘I haven’t changed I’m the same person’ over and over again. Now when I’m feeling down he’ll just say ‘why are you crying for’ in a really moany way. I know most of you are going to say he doesn’t love me but I know for a fact he does, I just need an explanation or some advice on how to deal with this sort of behaviour