I think most therapists expect these things to happen and know how to handle it. I literally told my T that I am obsessed with her and she didn't act surprised or creeped out at all. Instead we just talked about why I have those feelings and where they're coming from. It is really hard though and I still often miss my T even though I see her every week. My T has had tight boundaries from the beginning (no emailing) and a suspect that is in anticipation of feelings like this arising.

Also, from my experience changing Ts won't help the situation. I have had transference with all three Ts that I have seen with my current one being the most intense.