Just a guess but, "I love you so much I feel like I'm going to faint".
Of course, that's just the kiddie-friendly version.
What does the abbreviation "I.L.Y.S.M.I.F.L.I.G.T.E" stand for?
I Love You So Much I Feel Like I'm Going To Explode
I Left Your Stupid Mom in Florida, Like I Got the Email!