I gained weight after work, and my girlfriend broke up with me. Later, when I lost weight, she came to me again. But I have someone I like now.
As a master said, when you (sincerely) can't tell which girlfriend to choose, you choose the one you know later without thinking, because there must be something wrong with the one you know first, so you know the latter separately. You know it in your heart, but you really don't know it.