I’m not sure if I like my friend

I have been friends with a guy for many years and we are not super close but we talk often. He is a really nice guy and I have had quick thoughts in the past about being with him but these were never serious thoughts. I was never that attracted to him but maybe a little bit starting not to long ago. Neither of us had been in a relationship while we’ve been friends with each other. Recently I sent him a picture of me and my friends and was kinda taken off guard when he commented on my friend being really cute. Since then (this was about 3 weeks ago) I have been so confused about my feelings. I’m not sure if I like him or if I just like the attention. I thought maybe I just couldn’t stand not being number one but it’s been about 3 weeks and I still can’t sort through my feelings. I suddenly find myself worrying about other girls he may be talking to. We’ve been trying to plan to hang out and I’m worried he just wants to see my friend. I know I’m being ridiculous and spiraling. I just keep telling myself how stupid I’m being and how I’m a bad friends and it makes me feel worse. How can I figure out my feelings?