I think the suggestion of therapy and working on self respect come from the fact that op already gave him her number and expressed interest but he never called. It's been at least few months. I think it's the same guy.

It's probably wise to forget about him. It also most likely comes from previous posts about other males who didn't reciprocate.

Without knowing op in person it's hard to tell why ( my guts are telling me that these are wrong guys to pursue).

Hence the advice to seek therapy to explore why one keeps getting interested in these types of men or if op misinterprets signs etc it's hard to tell what's going on. I think that's why people talk about self respect and therapy.

Just liking a guy isn't unhealthy.