The amount of alcohol that a person can tolerate varies from person to person, depending on factors like metabolism
, number of years one has been drinking, etc. So what your friends can easily tolerate may be too much for you. And fainting
after drinking is not normal. It is a signal for you to cut down as you are drinking much more than your body can tolerate. There is also a risk of injuring yourself, so please cut down. Also see a doctor so that you can be assessed for any other possible causes of fainting.