Should i/Shouldnt i, help appreciated!?

You be an adult, tell him"Look, the attention is flattering but the fact is YOU said there was not the right chemistry and therefore there will be no romantic relationship between us.I have feelings for you so I need to cut off contact in order to move on, sorry, but it is not fair to me to have a friendship type relationship with you while I have romantic feelings, it just hurts me and will hurt us both in the end.Do not trust this guy.