"Thinking of beautiful things"
"Thinking of things that are beautiful."
"In thinking of what is beautiful.."
You really need the context of this, so that we can pinpoint it a little better, because it is a little ambiguous.
The second bit, "un amor como tu." means literally,
"a love, like you..."
Again, we would need the surrounding text because the context could be different depending on the sentence.
She could also be speaking ungrammatically and be trying to say "un amor como el tuyo"
which would mean "a love like yours."
So, yeah, hopefully, that helps. We would need more information to be able to be more exact.