[¯|_(ツ)_|¯]

I agree with Daisy that one thing you should do before making any decisions is weighing the pros and cons. What are the pros and cons of breaking up with Abby or staying with her? Do the pros of breaking up with her outweigh the cons? Another thing to consider is if you are happy in your current relationship. If you're not happy in your current relationship then maybe it would be a good idea to break it off so both of you can find someone that you are happy with. There's no use in stringing it along, after all! So, put a bit of thought into it before rushing in to any decision you make. I think that putting thought into it and following your heart will go far.