Yeah, the problem is I don't have any option to go visit her any more. At the park I can only use the running track or wander, both options only give me the same encounter with Beth.
So what happened here is that the game is trying to get you to encounter the scene where Beth gives you her phone number , but in this current version that scene is only available at stage 4 and 5, so if you gained weight past that point without getting the number it's just going to keep making you encounter Beth, its a know bug. I was going to wait till the next version to patch it out, but I think enough people have encountered this problem that I will put out a small patch to address it.