Should I call him back?

I don’t want to seem desperate. He would call me all the time and text me and stuff but then randomly became really bad at communicating and responding. I brought it up and he just said “sorry”. Well after a few days of him leaving my calls unanswered and barely responding to texts I just told him “now that I’m trying to get to know you, you seem uninterested so I won’t be reaching out anymore”. He didn’t respond to the text but did try calling me last night. I didn’t answer because I was still a little upset. Should I call him back or would it look desperate? We have been talking for a little over a month. We don’t talk all day long and I don’t expect us to but it would bother me when he would call me/ Facetime me multiple times a day and then just changed all of a sudden.