Why is it so hard to be just friends with someone you like?

I want to be more than friends with this guy but I can’t…we’ve known each other for years now after meeting at university and he would show signs of liking me. I admitted I liked him but he said he didn’t feel the same way so I let it go and for a few years we didn’t talk and he moved away. Recently we’ve started talking again but it’s really hard to be just friends with him…he knows how I feel and I can’t have more even though he is being friendly etc…why is it so hard and why did he want to reconnect anyway knowing I like him?

Why is it so hard to be just friends with someone you like?
Post Opinion