Do you smoke? That could be why you have lines around your mouth. I don't smoke but my mum's friend does and she's started using a product from Avon called Anew clinical plump and smooth lip system. One end is supposed to smooth the fine lines around the mouth and the other end is supposed to plump up your lips. I have to say there does seem to be a slight improvement.
Also people seem to be going crazy over Anew age repair day and night cream. And Anew contouring eye system.

Also, Do you have No7 where you live? They have a beauty serum that was featured on "How to look good naked" (a tv show) as the best anti aging serum tried and tested and everyone went mad over it, you had to be on a waiting list to get it.

You could also try something with glycolic acid in it.