i only have a fragment of this song. i need to know the artist and the song name. can anyone help me?

Question

here's the fragment:
I'll never mess around
Don't expect to much
and I'll never let you down

Answer 1

Slow Down Baby by Christina Aguilera

Answer 2

You're probably thinking of...."you can trust me not to think, and not to sleep around....if you dont expect too much from me, you might not be let down..." "Hey Jealousy" by Gin Blossoms