Wat do I say

So my ex from 5 yrs ago ( were still friends) told me that he likes me and hes been hitting on me (sexually) for a few weeks now (i also just got out of a rough relationship) and I told him like I'm not for it like I'm not in the right mind set right now bc he knows wat just happened but I don't feel the same way so "I replied idk wat to say about that" and I asked why he likes me bc omg I'm "rude" to him but I dont know how to tell him I dont feel the same *I hope this makes sense*