hi and welcome shyguy

if your mom keeps asking you if you are ok, that means she knows something is up and is trying to get you to open up to her, i know this can be hard but there ways to do this, a couple of simple ways to do this is:

write a note explaining how or what you are feeling and leave it where you know she will find it, put in the note that you wanted her to know what was going on but you dont want to talk face to face about it, ask her to write you a note back with advice on what she thinks you can do to help yourself, thats one way to get around the whole awkward situation.

you can do the same via email if your mom is online.

another thing you could try is the same concept but with a school councillor, they have them at your school right?, that another line of communication open to you, again if you dont want to do it face to face ask for a email address of the person in charge, create a new email addy and only use that to ask your questions it depersonalises the whole concept thus making it easier to talk,

if you need someone to talk to in here i am online pretty much all the time, so pm me or feel free to post in this forum any concerns you have, start your own thread, go wild