My mum acts weird about me having guy friends. What should I do when I want to meet up with him?

Last week my boyfriend dumped me. I was afraid to tell my mum because of the way she would act. I eventually told her but she acted weird about it, and now still is a little strange about it. She keeps asking questions when I keep telling her not to make a fuss of it and that I don't want to talk about. 2 days ago I met up with a guy I had been friends with for a few weeks. My mum didn't know I met up with him. We got talking and we are now dating. We're planning to meet tomorrow but I don't know how or what to tell to my mum. I could tell her the truth about that he is my friend and that I'm going to meet up with him. (Don't want to tell her we're dating yet) or I could say I'm meeting someone she knows and then obviously go and see him instead. If I were to tell her the truth about me going to meet him, she would get really funny about it. She wouldn't understand how I'm friends with him or why I'm meeting him. If I do tell her the truth I'm planning on saying something like .. 'can you drop me in town please because I'm meeting my friend, (his name). She would then go on to ask me - who's that? How do you know him? How come I don't know him? How come you've never mentioned him before? How are you friends with him? I know by her asking questions she is just doing her job but it's the way she acts about it. If I don't tell her the truth about who I'm meeting I'm afraid I won't get away with it. What should I do?