It's not that cricket is the only followed sport. Though it's the most followed there is a sizeable following for Badminton, Kabaddi, Tennis, TT, Football Wrestling, Athletics, Boxing all forms pro/amateur, Golf, Shooting, Hockey and some more.
We have had problems with our basketball federation infighting which hasn't helped and we don't even send our teams to Asian Games and there is only a negligible market for the sport.
I personally follow a lot of summer and winter sports from Biathlon to Surfing and Sepaktakraw to Figure Skating.
Football, Aquatics, Judo, Gymnastics, Basketball, Volleyball are some of the sports that don't fall in my list.