A love triangle is usually a romantic relationship involving three people. While it can refer to two people independently romantically linked with a third, it usually implies that each of the three people has some kind of relationship to the other two. The relationships can be friendships, romantic, familial (often siblings), or even pre-existing hatred between rivals.

...........................

I'm inside a triangle
A triangle that does not have a shape
The love triangle filled with pain
The pain I've always wanted to escape

What can be compared to what I feel?
Can you find what is wrong?
Do you feel the same way I feel?
To not know where I must belong

I know I could've just let go
But I feel so much love for you
As you divide your love for two
Was it really love for me, is it true?

How can you let yourself watch each one of us?
Playing numb in this triangle
In a game that really drives me crazy
But a game that makes you happy

It kills me in the nights when you are not here
I know you are with someone else
But a kind of worry I have to deal
I have forgotten what was real

A love triangle
A really messy shape
It goes around like a circle
Like a circle that I find hard to escape

T_T