In Love With 2 Men! Help me!

My boyfriend and I just started dating a month ago. It is the type of romance that happens so suddenly and so quickly. We are already in love. We spend all of our time together. On the other hand, I still text my ex (whom I was with for 2 years), because my feelings never truly went away. Parting ways with either of them would make me very sad. I don't know what to do.