Everything I do, I do in order to make you happy. Don't forget that.

My attempt: herseyi yapdigim, seni mutlu etmeni/olmani icin yapiyorum. Bunu unutma!

I think I am way off, can someone help me?

Thank you so much. I am learning hehe

Bir şey değil.

The difference between these two, seni mutlu etmek/senin mutlu olman, is that

mutlu etmek: to make you happy, because I make you happy
mutlu olman: being happy, because you will be happy

And I also want to clarify this:

when we say "gittiğin yer"(a place that you went) "gittiğin" will be an adjective in the sentence.

when we say "gittiğini gördüm"(I saw that he's gone) "gittiğini" will be an object in the sentence.

A little hint: If there is a suffix(-i, -ı, -u, -ü etc.) after these types of words, it is not an adjective. As you can see above.

Wow thank you. That helps a lot!