I cannot believe how nasty people have been to you on this site. I hope they reread their comments and feel ashamed. Please don't take any notice...at least one of the respondents is extremely unpopular on here and known for catty comments. It isn't really appropriate as it is obvious that you are still quite young.
In answer to your question, it wasn't exactly a lie...just a little white lie because your male friend was feeling a bit nervous, as you and your female friend have been a bit pushy with him. Just chill out and regard him as a great male friend, rather than a potential boyfriend, and you will get on fine.
btw I don't think a year's age gap makes a lot of difference.