I can’t stop eating!! please help?

It's not really "very bad" unless it's causing you to overeat. There could be several reasons for this, but the most benign is that you simply like the feeling of being overfull. There is nothing wrong with that if your calories are under control. Stopping when full is not a requirement for weight control. If your calories are not under control, then this is a habit that needs to change. Calculate how many calories you typically need to reach that satisfied feeling, then the next time you put food on your plate, put 5-10% less. People can't really tell the difference in the size of their meal if it's up to 10% smaller. Keep going down gradually every week until your meal is within your planned calories. Alternatively, replace bigger and bigger parts of your meal with vegetables. This lowers calories without making the meal smaller. The above strategy is if you wish to keep eating beyond fullness without overeating. If you want to unlearn that habit altogether, there are different strategies for that which others may help you with.

If you're just eating and eating and can't stop because you're just never full enough, there may be something hormonal. Have you been on a strict diet? Are you already thin? Have you lost too much weight too soon? Are you eating back your exercise calories? Have you had your hormones checked? Several things can cause hormonal disruptions.

Do you suspect you may have binge eating disorder that is mental in origin? In that case, expert help is your best bet.