Should I make the first move?

I haven’t spoken to a good friend of mine in almost two months. I don’t know what’s going on. The last time(nearly 2 months ago) I spoke with this friend he said he would call right back that he had to take a call. He never called back. I called him back a few hours later and he didn’t answer. For two days I tried calling and leaving messages and he didn’t answer or return my calls. I gave up. In the past two months he hasn’t tried to call nor have I called him. I spoke to mutual friends and they have spoke to him. They were surprised that I haven’t spoken to him and even more surprised why he hasn’t called me. I did my part by trying to call and talk to him, but he isn’t doing his part. Nothing happened between us for us not to talk to each other, but it’s bothering me that we haven’t spoken in so long. We have been really good friends for years. Should I try calling or wait it out? It is a two way road. I can’t be the one to always try and call if he’s not even trying.