I like my friend cum ex for over 6 years and he knows it all and now he's started showing feelings for me what should I do.

It's all started 6 years ago with a sweet friendship for an year after that we started having mutual feelings.. we then began a relationship that only lasted for 3-4 months and then he said he cannot see me as his girl .. I had no courage to speak to him and say I have started loving him since before ... I agreed to him and we became friends .. I cannot explain it in words but then became more than just friends(I don't like it as friends with benefits) but not were into an relationship .. the whole idea of being with him and not showing my feelings was wrong .. but I only wanted to keep him... that's how it became more complicated as he has to be more conscious for me .. at some point I had become possessive ... for after an year I told him that I like him ... But he had no feelings for me I never forced him .. but nothing changed we still were close to each other ... It's now 6 years and in past I only dated just one guy that too I never met him and it lasted for 4-5 months on telephone only(long distance) .. now coming to guy I had feeling for all these years is now interested in me .. what to do ... 🥴🥴???