Looking on the internet deeply has found these results:

thinking on me is the most popular phrase on the web.

thinking in me 1416,000 results on the web	thinking on me 1430,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I don't want anyone thinking about me in gym knickers. I'm just glad you're thinking about me in the shower, Judge. You could start thinking about moving in with me. Those of you in 1 They're thinking of putting me in your fourth period government class. Emery, you are very much a married man and I don't want you thinking of me in that way. 5 must desist in thinking of me... as the drill instructor for the next 60 minutes. Thinking about me in the shower?	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

thinking in me

1416,000 results on the web

thinking on me

1430,000 results on the web

More popular!

I don't want anyone thinking about me in gym knickers.
I'm just glad you're thinking about me in the shower, Judge.
You could start thinking about moving in with me.
Those of you in 1
They're thinking of putting me in your fourth period government class.
Emery, you are very much a married man and I don't want you thinking of me in that way.
5 must desist in thinking of me... as the drill instructor for the next 60 minutes.
Thinking about me in the shower?

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.