To ______, A Warning

I don't know your name,
We briefly met through a friend.
Now I hear that you're interested in me,
But before we start, let me tell you how it will end.

I don't know what you're looking for,
Be it a commitment or some fun for now,
But I can't fill either of these criteria,
And I'll tell you why and how.

I am a melancholy man masquerading as a joker.
I ridicule everything to soften the blow.
Humanity is a disease of which I am a part,
I cannot change my role as such
And this breaks my heart.

On the surface I may be funny,
but deeper so I am dour.
I have no hope and I want none,
Life to me tastes sour.

If you were to love me I'd break you.
For atop of all this, I love another.
What she's done to me can't be fixed by you,
From our past happiness I'll never recover.

Simply because the one I love loves me not
Does not depreciate my love for she.
I feel I have earned my despondency,
And I don't blame her for not loving me.

As for some short lived fun
Of having someone;
A person to pass "I love you"'s between,
And a boy to fool around with,
I am a terrible lover, just ask the last two women I slept with.

If you have needs physically I will fall short;
If you have needs emotionally I will be distant;
If you have needs of healing I will only hurt;
If you have needs of escaping I will be complacent.

My advice to you is to ignore me--
Occasional hello's and casual conversation aside.
At all costs, don't get to know me.
There will be no benefit, and at worst you'll die inside.

But if you wish to disregard my warning
And to pursue a relationship with me
You can have as much as I have to give.
Just remember it doesn't belong to you,
This line around my wrist.
My heart belongs to Thisbe,
And my soul no longer exists.