Do you know that she was Bi before you dated her?
Yes
All depends on what a person looking for
If you're into just having fun then no big deal dating someone that is bisexual
But if you are looking for a serious relationship, you're wasting your time with someone Bi, because some mornings that person wakes up and they are interested in a completely different sex other than yourself
There's no way they can ever commit or devote 100% to you
I've actually known and been friends with many bisexual girls
What is interesting is they all have different levels of preference
I would actually ask them all what percentage do you like guys and what percentage do you like girls
Some will be 50-50, some 70-30, and so on
It varies