Germophile

I'm kinda in the same boat. My mom doesn't seem as excited that I have an offer to UofT, which is arguably the best school in the country. When I bring it up she keeps saying I should wait to hear from UBC (Vancouver), think about finances, you can stay at home etc etc. I got an offer from UBC today, but the past week I've been excited about going to Toronto and decided I would want to go there even if I got a UBC offer. Now theres the conflict of telling her about my UBC offer and fighting to leave, or just lying and saying I didn't get in. 
ANYWAY, I'm saying this because at the end of the day I'm going to make the decision that is right for me, and is what I want to do. If I make a choice because someone else tells me to and it goes poorly I will feel resentment, even if it's subconscious. If my choice doesn't go the way I want, I will only have myself to blame and I can live with that. 
It really sucks that you've lost the excitement, but there truly is a lot to be excited about! There will be many people on this forum who will not see any offers this year and you can be proud that you were one that got selected. I have found this community to be very supportive of others, and everyone here is in the same boat with similar experiences. Congrats on your offer, and do what's best for you.
Your parents will come around eventually. Opportunities like this may not.

Thank you for telling me. Anyway...Good luck to your application! Hope you're going to get an offer soon!
Pending: UC Berkeley (MCB), Emory (Neuroscience), UC Irvine (CMB), UPitt (PMI), U of Miami (PiBS), Harvard (Immunology)
Secondary Application: UT Southwestern (BMS)
Interviewing: IUPUI (IBMG), UAB (GBS), U of Arizona (ABBS), Purdue (Biological Sciences), U of Maryland (Neuroscience)
Rejected: WUSTL (DBBS), Mayo (Neuroscience), Rockefeller (Bioscience), UW (Immunology)

It's totally not fair. I agree. Just take her comments with a grain of salt. Perhaps surround yourself with people who will congratulate you and get excited for you, which will help balance the lack of support from your mom.
I'm in a similar boat -- my parents are not happy about me applying either. But their reasons are less about me moving away and more that I will be forever poor and hungry (perks of being a humanities scholar). Last year was my first time applying - I didn't get in anywhere and her response was, "Well, it wasn't meant to be. It wasn't going to happen. So when are you getting another accounting job?"
I have built a support system in friends (not my family as you can see why), and I think that is so important. I hope you have supportive friends! Mine pushed me to apply again and helped me stay positive. Now, I have actually been accepted to some programs this year. However, my mom still isn't happy and was even surprised I would apply again. I didn't let her get in my head and, I hope you can keep positive too! You definitely have a supportive community here at Grad Cafe!