Hi SumanYour first problem lust, its something thats in our brains most of the time, unless you are moving your thoughts to action, then if not there just thoughts, but for you, lustful ones.
As for your cousin,s it seems one has put it out of her mind and wants to carry on knowing you as you are and not the lusting young man you once were, and for the other one I think the same, if your culture thats strict, then they have done the right thing, and just forgot about what has happened in the past.
As for you, and masturbating, just try and keep it to a low key, as over masturbating can bring on ED, give you memory problems, and then there a long list of others problems, and your other lust problems are all in the mind, so if study controls your urges, then keep studying, use your lust for times when you need to relax, you need to find yourself a women who can take control of your lust, this would be good for you and a lot better than masturbating, then sex always is.
Hope this helps you.
i will respect them and i will become a role model to everyone in my society and in being self-control.hereafter ma.
thanks and i will follow your advice...