Don't do it. Long story short, when you have sex, chemicals in your body are released - and while it's a very euphoric feeling, these chemicals combat the chemicals that cause passion among people who are dating.
Put differently, unless you have been dating for over 2 years, dopamine makes any two people, who are in love, blind to the defects of the other person. When you have sex, that deep passion, caused by dopamine, takes a big blow. That's what causes "one night stands". Temporary passion is killed by sex, and then the person is no longer in love.
If you have been dating for a long time, get married, and then have sex. Then it's far more likely that he sticks around, because he would love you for more reasons than simply dopamine blinding him to reality.
Put differently, unless you have been dating for over 2 years, dopamine makes any two people, who are in love, blind to the defects of the other person. When you have sex, that deep passion, caused by dopamine, takes a big blow. That's what causes "one night stands". Temporary passion is killed by sex, and then the person is no longer in love.
If you have been dating for a long time, get married, and then have sex. Then it's far more likely that he sticks around, because he would love you for more reasons than simply dopamine blinding him to reality.