If you like two people, is it easy to choose between them? Should it be easy? What if you like someone, but he/she likes someone else as well as you? When is it time to give up on pursuing a relationship him him/her?
i think once you've got to know them it should be easy to tell which one you like best. we all have the capacity to like more than one person at a time, there's nothing wrong with it until you cheat.