Boy problems 🙃

So I have an ex which I fell complete head over heals, we were together for 1 year and 1 month, we were young and maybe that was one of the reasons we broke up but that year was amazing. The thing is I can’t stop thinking about him, I’ve talked to other guys, gone on dates but my ex ALWAYS comes to mind. To be honest he was perfect for me and always made me feel like a princess 💕 And well we broke up over 4 years ago, I haven’t spoken to him since but I want to know how he’s doing. What should I do ? Keep these thoughts and feelings to myself or reach out ? 😩😭