Not meaning to sound harsh, but she is looking for attention & drama & you are giving it her in spades imo.
I agree with custardo. Why do you continue to feed her want/need for attention? When you call I assume you probably end up crying, begging her to come home? Playing right into her hands, everytime. My god, what more attention could a 14 yr old want? Police, SS, you on the phone begging her to come home, this guy supporting her, her friends thinking she is cool for 'leaving home'
Stop calling her, I know it will be hard. Once the attention dies down & she realises that this guy won't be able to provide what she needs she will be home.
Or the next time you talk to her, just say 'you ok, got what you need? Bye then'. Don't play into her hands!
Get official with this guy, get a sol to draft a letter & send it to him. Full parental responsibility. If he thinks it's so great she has left, then he take responsibility for her. Simple!
You have given her a huge amount of freedom in the past, she hated school, so you home schooled her, laid back rules & now you refused to let her go to the party, she is probably confused/pissed off as to why you suddenly pulled the 'mum' act over it. She didn't like it when you said NO to her.
And of course she doesn't care about anyone else, she's a teen! That's what they like you to think.
You can repair your relationship. Quite honestly, if you have that attitude when she comes back, she'll be off again. Please do someting constructive. Get on with your life & get the legal system down on this guy...then see how quick she comes home!
And in all honesty, if that were my daughter, I'd be at the door & telling her to get her arse home as quick as she likes!