What will be the best way to turn a guy's feelings down?

Anonymous
So I have this guy, we were working for the same company but we only met for once and since then he kept calling and texting me, for some time I stopped texting him back because he made something that annoyed me but he didn't stop sending msgs for a couple of months so I texted him back. He told me that he loves me and that he's even ready to marry me. But I'm not really interested in him so what do you guys think is the best way to tell him that?
Updates
1 y
I texted him and told him honestly that I'm not interested in him and he accepted my answer without any problems. Thank you everyone!
What will be the best way to turn a guy's feelings down?
4 Opinion