If you don't want to get married, then just don't ! For some of us, marriage just didn't work out. Nothing wrong with being single at all. Some day you just might meet the lady of your dreams and change your mind. Until then, just be happy as you are !
I do not wanna marry someone, is it good if I wanna be single the whole life? Regards, Mateusz Gajdziak
Only you can determine that, do what works for you. One thing to note here: Many studies have shown married people live longer...just saying.
It's perfectly OK to remain single. There are a lot of benefits to finding a lifelong partner but there are also benefits of the single life.