is there a way আপনি can mark your stories you've already read অথবা not, cause after a while i keep পাঠ করা the same stories

No, but আপনি can add stories to favs. and click the update box at the শীর্ষ twice, that'll give আপনি the update তারিখ from closest to that day, to the farthest... hope i was help!