I'm having a difficult time trusting my 14 year old daughter. Do I spy on her?

I have caught my daughter in little white lies and now I question EVERYTHING she does. This is leading to us not getting along and many arguments. Most of the lies are told when a particular boy is involved. She knows I do not like this boy and would probably not let her hang out with him if she asked me. The lies that I am aware of are when she said she would be walking to the park with a neighborhood friend, but meets this boy at the park instead. I have no proof, but pretty sure my gut feeling is correct. One day I continued to ask her who she was going to meet and she admitted that she might see him. So, today is the last day of middle school. She says that after school her bff and some other friends are going to hang out at a Burger joint a couple of blocks from the school. I'm having a hard time believing that this is the only plan. My mind keeps wondering thinking this boy is involved and that they will end up at a friends house or something. When I asked her to be honest with me she gets upset and frustrated with me. So how do I let her have fun on her last day and not worry about where she is. Have her text me every hour and send me pictures? Spy on them? Her bff's mom is supposed to pick them up after the burger gathering and she will be spending the night at their house. Her bff's moms lives far away so I'm not worried about the boy when she's there. I plan to call the mom and confirm this plan. I have to admit that I was very sneaky at this age and did plenty of things behind my parents back. I am scared to death that she make the same mistakes I did.