Hi there didn't have the guts to post this on aibu and just asking for honest but polite opinions. My daughter is 18 and in sixth form she turns 19 in September although probably not relevant. She can also drive. She has recently started going out very late at night 10pm - 11 -12 and sometimes even 1am. This has happened on around 4-5 occasions. The first time she went she said right I'm going out (was completely out of the ordinary! And I and her dad was sitting in the living room and of course just asked where) and her response was "I dunno I fancy some fresh air" and her dad was very much "but you have college tomorrow what's brought this on" and she very much had an attitude of "right you're never getting an explanation again now, like that was even an explanation!?!?) so the next time she said she was going she just said "right I'm going out" and we asked why and she completely ignored it and off she went.
I know it's not really my business but I have no idea where she is or when she will be home. She is still only a sixth form student so not exactly old. She isn't confident and outgoing at all (if she had lots of friends I could completely understand) but it's not really her.
Any ideas or solutions please?