<before edits>: ... "eres por sobre todo"; which is not correct. Apart from my option, it could be as well: "eres, sobre todo," I've also substituted a ";" for a "," --just before "siempre"--, because of the change of subject.
Sen hayatımın yolunu aydınlatan güneşsin, sen hayatta kalabilmem için almam gereken nefessin, sen Tanrı'nın yarattığı en harika varlıksın, sen, hepsinden öte, hayatımın aşkısın; bütün zorluklara rağmen her zaman yanında duracağım.
Seni seviyorum.
Remarks about the translation
Bridge by Lev van Pelt: You are the sun that lightens the road of my life, you are the air I need to breath and keep myself alive, you are the most wonderful being that God has created, you are, above all, the love of my live; I will always stand by you, against wind and tide/against all odds. I love you.