I think ...

I think about you.
I think about you every now and then ...
I thought about you today.
I thought about you last night ...
I've thought a lot about you lately.

I'd like to think that you think about me.
I'd like to think our minds trace each other's thoughts at the same time ...

I wish I didn't think about you.
I wish I had someone else to think about?

It would be best for me to stop thinking about you!

...

I'm still thinking about you ...