Sorry to hear where you at - I know it can be very debilitating and draining. You need to try and get out and about - be around people and ensure you are doing things. Else it just becomes too easy to dwell on the negative emotions, instead of feeling them while they are there, and then moving on (I'm terribly guilty of doing this!)

I used to tell my boyfriend every now and again that I was feeling depressed, and he'd brush over it, which would make me very upset. I discussed this with my T, and she came up with the following possibility:
The people that "ignore" us are scared of depression themselves. They may have had negative experiences that they wish to block out. They may not know how to handle someone's depression. So they brush over it, so as not to have to deal with their personal issues.

I hope your mom does soon understand, but like Innerzone says, don't palce too many expectations on people - you have no control over their responses, and are likely to react negatively if their reactions do not meet your expectations.

I'm glad you're reaching out - remember: we are here for you too