The meaning of Petar's I love you to Nikolina

The meaning of Petar's "I love you" to his girlfriend Nikolina I love you and will love you for as long as you don't betray my trust in you.
That means forever like ever even do she's dumb sometimes even do she doubts her self even if she sad some times depressed messy what ever she can think of reason for him to leave her he will not cuz her boyfriend aka Petar loves her until the end of time