It gets better eventually
lol, I am remembering when AprilLove first caught on to the bell, she had me jumping up and running to the door every 15 minutes for what seemed like months!!!! and i posted about it here, too. hahaha. But it really wasn't months, hehe. I used to kid about how well she had me trained.... now I don't kid about it... she HAS ME TRAINED
But in all seriousness, you will start to learn the signs and know when your little one is just doing it to make you open the door. What I did start doing back then, was when she really went, I would give her a treat. When she rang it, we went out and she just wanted to play, no treat. She is 5 now, and very well trained. But she does have this nasty habbit of ringing the bell just as I have.. um.. sat down to do my thing in the bathroom. hehe