I have two kids - 14 & 17; I have always had great relationships with both. However, when my daughter hit the teen years, I suddenly was no longer needed. It was as if she changed overnight - doesn't really talk to me about personal stuff; she didn't even tell me about getting her first period; seems she's only nice to me when she needs/wants something. I've told her many times how she has hurt me and it doesn't seem to phase her. I just keep praying it's a phase and we'll be best friends when she's an adult; if I survive!
As for my son who is 17 - we still have a great relationship; and no, he's not a mama's boy. He and I can talk about everything. If he gets a little snippy with me, I'll tell him about it and he'll apologize for his bahavior. His whole attitude is totally different than my daughter's. It's as if they were raised in two different houses! I've always treated them the same, etc. so I'm not sure why so different.
I hope your relationship continues to be a good one!!
Good luck!!