My vagina is too loose while im sexually active before 3 years but no sex last 3 months, what i do to make it tight???? it depressed me day by day

Very unlikely: It is highly unlikely that your vagina is too loose. That is not really something that happens. After multiple vaginal deliveries or other trauma some women experience prolapse of the pelvic floor which can be surgically corrected. At 23 years old that is not likely. Consider seeing an Obgyn who can do an exam and determine if your vaginal anatomy is normal or if something else is going on.

Kegel exercise helps: Obesity, vaginal child birth and cesarean section are common causes of your problem. Loosing weight and doing kegels exercise to strengthen pensive muscles should help greatly with your abilityto have meaningful sexual life.