Why do I feel guilty for not liking her back?

[Anonymous]

A girl (girl A) in my class liked me over a year ago and sort of asked me out, but she ended up dating another guy. Shortly afterwards, I ended up liking one of her best friends (girl B) and tried to pursue the friend, but it didn't end up working out.

Now girl A has broken up with the other guy and she's started talking to me again. As of right now I'm seeing another girl anyway so I can't really pursue anything, but if it does ever come to it then I have to tell her that I'm not interested in her in that way.

Its going to be hard because I really do like her on a personal level, I just don't have any romantic interest in her whatsoever. Part of me feels like I should like girl A because personality wise she's very similar to girl B, both of them are very sweet girls and people whom I'd like to be friends with. Also, girl B is the more attractive one of the two so part of my guilt stems from that, even though I went for girl B while girl A was taken.

Love triangles suck.

Updates

+1 y

EDIT: Girl A does not know about what happened between me and Girl B.

[emkbot]

Listen, you can't feel guilty for your own preferences, it doesn't matter if they're shallow or not. When you go out shopping for fruit, do you buy a product that looks ripe, pre-ripe, or over-ripe? (example: bananas. Some prefer to buy them before they're ripe, right when they're ripe, or when they're way over ripe. It's a preference thing.)

I'm not trying to say that picking a girl is like shopping, but I'm trying to tell you that your preferences are decisions you make. Even if you feel guilty, leading her to believe you like her is far crueler than telling her the truth.

Ask her to be friends with you. That's it. If a guy came out and told me the truth instead of letting me run around and act like a love-struck fool, I would appreciate him much more. Overall, I'd respect his feelings.