You can have idols of course. But you should play for yourself and for your pleasure and not to impress others. If you are playing just to impress others than you are missing the point of playing a guitar. That can also be said for other things. Always try to find things in life that you really love doing, and then nothing can make you stop doing that, until maybe you find something else that you like more.Question yourself on what is the reason you started playing. Be honest, or you will never be truly happy. You can live your whole life doing things that other people expect of you, and then once you realize that you might be really disapointed. If you remember your true reason of why you like playing keep it in mind and play for that reason, that can lead you to great things, so you will never be sad like you are now. I bet your cousin wasn't the only reason for doing that, and once you find the truth about your love to guitar, once again you will feel the pleasure in doing so!I hope you will not stop playing, but try to become better and practice, maybe write songs about things you see in your life troubling you, or making you happy. Don't give up...