How do you feel about being friends with your ex?

My ex and I were together for 5 years and broke up. It took me a while but I am truly finally over him. We didn’t talk for maybe a year and a half and now we both live int he same city. He hit me up and we’ve texted but it never went any further. We decided to hang out and I thought I would feel something and i literally didn’t. I’m 22 and I feel like I’m mature enough to be over the relationship and still be strictly friends. I don’t miss the relationship but I miss him as a person. This is not a priority in my life at all but What do you think? Has anyone else been friends with a long term ex and how did it go?