Is it bad to always go to her house?

I really don't think it's always bad to go to her house. But sometimes you should invite her over to your house too, because she might get tired of having to be at her house all the time. If she goes over your house make sure you tidy up a little bit so she can feel comfortable. If she can't go over your house then try to take her to a local park or mall. In a park it would be romantic and you can kiss or hold her.