My girlfriend's daughter is 19, and a sophomore at the local community college. She lives with my girlfriend and myself, and is like a daughter to me. I'm starting to worry about her and don't know if or what I should say to her.

To put it bluntly, she's annoying. She has a loud voice and doesn't seem to realize how loud she gets when talking. She's also very blunt and opinionated, so she says things people sometimes don't want to hear, also loudly. She seems to get angry very easily, even with her friends, I've found however, she is fine 5 minutes later, though someone else would assume she is very mad at them. She can be very rude.

The other day I was driving her to meet her friends and we stopped at Starbucks because we were early. The barista asked, "Didn't you go to **** high school?" After we got our drinks I asked if she recognized the guy. She said no, but she was infamous around that school. When I asked her why, she said because she was so annoying.

On her backpack she puts all kinds of pins and patches. Some are for boy band singers and stuff, but also are pins saying, "Feminist Killjoy", "You Stink", and "F**k Off". Not the message I would want her to give to the world.

I guess I'm worried she'll have trouble making new friends, or finding a boyfriend, ar getting along in the world. She's never had a boyfriend, and as far as I know, has only been on 1 date, which she cut short because "He was so boring". She's a beautiful girl, really, but her personality is so off putting. Should I try to talk to her about it? Keep in mind, she gets mad easily and then doesn't listen to anything I say. What to do?