A good trick to learn is when you start to feel close, pull out and take a second to calm down and come back from the edge. You can easily hide this by just changing positions!
You can also use a numbing spray. This is applied to your glans and then you put on a condom so as not to numb your partner.
You can also wear a cock ring to help your stamina and allow you to stay hard even after you orgasm.
You can wear a glans ring to cover your frenulum and make you less sensitive.
When you’re on your own a great technique to practice is called edging, this will help you master orgasm control during sex. You can enhance your stamina training with the use of a toy like the fleshlight or a tenga. If you soak the toy in very warm water for 15 min and use a warming lube like KY warming jelly it will intensify your sessions. You can also include a medical device call Prolong.
You can read about other techniques to treat PE in this article.