Could you please revise my post? :)

Hi there! My relationship with the english club has been lasting lasted since summer 2014. Today I may say that it really has given me a lot. I feel not just my own progress but even also see the progress of the others. (better way to say this: I not only feel myself improving, I also see the progress of the others.)
Besides practicing English you can find there smart and kind people of different ages and professions, interesting activities (playing some nice games, singing some well-known english songs...) and last but not least - a warm atmosphere. And all of these this is just for peanuts. What's a great deal, isn't it?
Go to our club, but keep it secret. We have a limited space ;)

has lasted vs has been lasting

this is quite complicated, and you can often use the two structures interchangeably. In this case, "has lasted" sounds a lot better to me.

read this link for more explanation http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro

Could you please revise my post?

Hi there! My relationship with english club has been lasting since summer 2014. Today I may say it really has given me a lot. I feel not just my own progress but even see the progress of the others.
Besides English you can find there smart and kind people of different ages and professions, interesting activities (playing some nice games, singing some well-known english songs...) and last but not least - warm atmosphere. And all of these is just for peanuts. What's a great deal, isn't it?
Go to our club, but keep it secret. We have a limited space ;)