Why does this happen?

I give all my love and trust into ones who are close

But all they do is leave

When I'm with them

I feel the most loved

I feel like I finally belong

I believe they truely want me there

There is no saddness, no pain, no chrushing lonleness

But there is a cruel catch

They use me

They leave me

Alone with more saddness in my heart then ever before

Why?

Why must everytime I see them, I let them in

I forget their mistakes

I forget that they left me

I love them anyways and always

I hate this emotion

The way i accept them

Even though they reapeat it again and again

But why?

That question that invades my every waking moment

Do they not see what they do to me?