What genres for my book?

I feel that my book has a little bit of everything, this is the story: a young mercenary travel the galaxy first to find his love, and then he discover his true identity in the process. It has some sci-fi elements (space traveling, cyborg, etc) and some magic (spells). It's an action adventure story with a little romance. Later it will escalate into a large scale war amongst the planet and the protagonist is in the middle.

And this story is aimed toward young adult

so what genres my story lies into?