Trying to find this one and it has been driving me insane, hopefully someone can help me out. Here is what I remember:

1. Takes place in high school
2. The genre is, possibly, shoujo
3. All three leads are high school students
4. It was published sometime around the late 90s or early 00s
5. Two or three (out of five-six) volumes got licensed and released in the West

I know it's not much to go on, but that's all I remember. I know there's one other shoujo manga that has a similar plot but where the girls decide to dump the guy, stay together and be friends with him.

Also, if anyone else has similar suggestions related to the title I'd be very thankful.