Why is my guy friend acting this way:(?

I’ve always had a soft spot for my guy friend. I’ve known him for 6 years but never made a move because the feelings weren’t strong enough and I enjoyed the friendship. I’ve had a boyfriend for 2 years now. The relationship is not great and I’m unhappy, naturally I started to confide in my guy friend and starting developing stronger feelings for him. I thought it was grim to feel this way and have a boyfriend. It got too much, I decided to tell my guy friend about my feelings and said we should stop talking for a few months so I can get over it. I did make it clear that I’d be back and that I wanted to stay friends because I didn’t want to waste the 6 years. He said dating me is not something he wants or ever will. He removed me from social media.

We didn’t talk for a few months. I reached out recently and we both agreed we’d be friends again but he said it’ll ‘take time’. Obviously it’s not the same. He never initiates contact but always responds to me. He’s up for meeting in summer but it’s always me making the plans. I’ve made it clear I want to be friends again, like old times. I don’t understand why he wouldn’t want to be friends again and forget about what happened, he said he didn’t want to date me, so if the attraction isn’t there then what is the problem? Why wouldn’t he just not reply or block my number? I really am over the feelings. The friendship is way more important to me. On the phone the other day he says ‘We’re not friends’ but continues to treat and talk to me like a friend. Why answer the phone? Why say you wanna work towards being friends again? What is the point of all this? I said ‘So why am I ringing you?’ And he said ‘You tell me’. I’m still removed from social media. I would understand if he was like ‘I just don’t want to be your friend period, leave me alone’ but he hasn’t said anything straight up like that. What do I do? What should I say to him? Men please answer and help, thanks. I genuinely really care about this person :(
Why is my guy friend acting this way:(?
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