Stupidly happy and it freaks me out?

So I'm absolutely, head over heels, stupidly in love with my husband. He's my sun and my stars. We've been together 8 years and married for 3, and the one thing I worry about is this feeling won't last forever. Everyone/everything I read says it will fade, etc. and it's always been a stressor for me. What a wonderful thing to stress over but I feel like it's so ridiculous. Haha. Please tell me you in-love for years success stories!