arrow just to reiterate my advice from before, best not to make too much of an effort, be chilled out, not a good idea to tell her you're ignoring her lol, now she's probably annoyed with you. But she said lets be friends so, if she's ignoring you but sits beside you, well that can only be a good sign. But next time don't tell them you're being cool with them.
in regard to helping girls, just be careful, because you're so nice and want to help, some people will take advantage and just use you.
If the girl ignored you on msn then i would take it as a sign she's not interested. I think the best thing for you is to not think about it too much, which i can see you seem to be doing a
lot better with. But my advice is always treat girls as if they are a male friend, but do flirt for a short period and then stop and move on, they'll be hanging on to your every word then and will likely be more interested. don't be obvious that you like them, let them work halfway