what song is this, it's been stuck in my head forever! D:?

okay, so i have this song stuck in my head.... for a LONG time, i'm
talking months! and i don't know the name of it and i don't know many
words, but at the end of the chorus, it goes, "holding on to what i
have inside" and the "inside" is held out for a while like
insiiiiiidddeeee. hahhaa, but anyways, can anyone name this song?
please, even if it's just a guess. ohh, and it's definitely a guy
singing the song. thanks! :D