Having a hard time likeing the family puppy?

I know how you feel, for a long time i couldn't leave my 4 month old white shepherd cross alone in the sitting room for even 1 minute. However, he has gotten a lot better with consistent training and age. The main thing is to be consistent. Have a stern word for when she does something bad (NO is good), restrain her an give her a tap on the nose. DO NOT hit her or cause her pain of any kind, it is cruel, dogs don't have the capasity to learn from it, and it just makes the dog angry and scared. A tap on the nose and a stern word will impress upon her that she's doing something bad. What i do to introduce my dog to strangers (he gets VERY excited) is i pick him up and let the stranger stroke his back until he calms down. They then stroke the back of his head, then the front of his head. Then i put him down, but restrain him by putting an arm across his chest until he definitely is not nipping them. I find that generally restraining the dog until he/she calms down works. Good luck, hope i've helped.