Can I use the word like and the expression as if in the same sentence?
For example: Is it almost like as if I were flying in the air? It's like as if you were me and I were you.

Question

Answer

Is it almost like as if I were flying in the air? It's like as if you were me and I were you.

Both  incorrect , but common in normal conversation.

"like " as in having rather similar meaning with  "as if" or "as though",  should be used before a noun , and NOT before a Clause. He looks like Joe / It looks like a box.
"It was almost as if I were flying in the air" ok "It was as though I were flying in the air"

It's as if you were me and I were you. ok

Answer

No that doesn't make any sense, use either or.