JP101 answered question 4/10/2011 My Boyfriend And I Used To Have Really Hot Sex..for A While Now Our Sex Life Has Gone Down. We Have Both Gained A Little Weight But Other Than That Everything Has Gotten Better Except For The Sex. He Says Its Not Me But That He Has The Problem? This is normal. The "fun, new and exciting" stage is over. Now is the time you see if it's true love, or just a fling.