Is it normal to love more than one person?

It's not love if it's more than one.

is it really worth it to lose what you have with the girl you've been with for four years for someone you've know for a few months?

maybe you just like the other girl not love her.. hmmm there's a difference..

Monogamy's over rated anyway. We as humans aren't meant to only love and be with just one person "for the rest of our lives."

Sure, people's spectrum of love isn't black and white. It's possible to culture feelings for multiple people at once romantically if you don't set healthy boundaries for yourself. Now is it right to put others through the tug-of-war? No in my opinion.
People are smarter than you give them credit for and intuition is a powerful thing. You would be foolish to think the charade will last, or that they don't already suspect or know that you are emotionally divided. This isn't fair to either party. Be responsible and choose a direction to pursue before you hurt both beyond repair and end up alone with your regrets.

Maybe one is love, and the other is lust? Not sure. Maybe they're both lust.

You be trippin