Can crushes stay just friends?

I am friends with a guy who I like but not convinced he is the right one even though I’m attracted to him. On the other hand he really likes me and wants a relationship. I just got out of one and am scared, totally not ready and I also am still struggling with mental health issues. He is pushy and saying it’s hard to just stay friends. What should I do? Would he respect me if I gave him space?
Can crushes stay just friends?
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