Mixed signals from a guy at work. Is he my friend or not?

I have been friends with a guy at work and then we started hanging out for drinks. Chatted daily via sms. During work and after work. He would often call me on way home to chat. Have worked with him for a while and all this contact was fairly new. We are both married. Happily. Have had social occasions with him and his wife. He would be playful at work with emails and little things left on my desk. I thought we were just good friends getting to know each other. Creating a friendship.. I admit to feeling having fun with him but would never take anything further. Never talked about my husband to him. He would often talk about his wife and how she was frustrated with him he never had friends or did anything. Fast forward he rarely contacts me to check in. Always has an excuse why he can’t meet up for a chat. Was I just played? Sometimes he agrees to hang out but looking back I think it has been all when he was wanting to. I miss my friend. I tried to talk to him about it but was kinda ignored. He still messages me and has general conversations but is never one to initiate and replies after maybe I’ve sent half a dozen messages saying hi how you going. Just so confused how someone can chat to you daily and build a friendship and then nothing.

Mixed signals from a guy at work. Is he my friend or not?
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