do u fall in love with two person at the same time?

It happens to me before. I fall inlove in two different men in my life. One is my boyfriend and the other one is my friend. I don't know how it happened, I just found myself being happy being with the other man. But I guess he's just a trial in our relationship. My boyfriend and I were still on for more than 8 years now and I have forget the other guy.

Falling in love with two different persons? This seems impossible. In my opinion, you can love only one person at a time, not two at the same time!