A few things:
It's good that you're asking for help. This shows that you're actually trying to better your situation instead of just holding it all in. You sound like you're constructively dealing with your past.
Second (and please forgive the language, but I'm using it for a reason) IF YOU ARE BIPOLAR, DO NOT USE ANTIDEPRESSANTS! THEY WILL FUCK YOU UP! I have four miserable years of my life under my belt from Prozac and Zoloft and then another two from Effexor. Not only do these keep you in a (sometimes dangerous) manic state, they have severe (often painful or embarassing) side effects. I could relate horror stories, but my cousin's make mine look like a walk in the park.
If you're going to go on meds, lithium works wonders for me and my family. Another drug on the market (that doesn't work at all for my family) is Depakote, but it's worked well for plenty of people with bipolar disorder.
Regarding your mum, I see it like this: She wants to go her own way, with or without you or your pop. Let her do that. If she'd rather go on about how spectacular things are instead of ask her daughter how her day went, then you can tell where her priorities lie.
I know things aren't easy, but you have to hang in there. Lay off the drugs. Lay off the sex. Lay off the booze. Lay off the self mutilation. That's about all I can give right now. I sent you my contact info, so feel free to contact me whenever you want.
Oh, and thanks for volunteering me, Mickey.