Introducing : eLKa, da friend ditcher

I just ditched a friend (and a bro) of mine today.
We were there in the library, but then suddenly my classmates asked me to go with them to do a chem e homework dued tomorrow. We planned to do this from far in the morning, so then, I cannot do anything about it, and we really need to get this thing done or I'm in a big s**t.
I kinda feel bad because I was in Wendt when he came alone (after we kinda ditched him in the Math class, sorry! :( ), and there I was, selfishly but 'cannot do anything'ly went away from Wendt. He told me that he wanted to eat and asked me if I wanna go eat, but then, I left him there.
The worst part is that he asked me again to go eat with him later that day. I feel I'm such a jerk.

I never want to turn my good friends down. This is beyond what I want.

I feel terrible. I can't find anything that can help me better saying "I'm sorry" than this. Bro, I trully am very sorry. Maybe it was just me being too sensitive about this, but maybe not! I do think I'm bad. I was greatly mad at myself for being very rude. If what I did made you mad too, I'm very sorry.

For you who reads this and understands what this means, hopefully it's just a ridiculous thought (so that then I can be relieved because I didn't make you feel bad). But if it isn't and I was really bad to you, you got these words from me : I am sorry. Never do it again.