You should calm down and relax.
Whats the problem?
so you havent kissed a girl and some other ppl have? It doesnt matter.
Dont feel like you need to do something just because others have.
Theres a thing about 'firsts' ...we usually always remember them...the first time we rode a bike without stabilisers, the first time we fall/fell in love, the first time we kiss someone...
Im not sure if youve seen the other threads on this subject?
First Kiss thread 1
or First Kiss thread 2
ooh and First Kiss thread 3
Theres alot of good advice and also alot people who havent kissed anyone, so you arent alone.
There are also alot of people who regret/wished their first kiss hadnt happened...my advice to you? learn from their mistakes