Everytime i have sex with my boyfiend without condom i bleed afterwards if we use condom i don't why?

You may lack : Appropriate lubrication for a possible too big of a package... He may have. Try the simplest to get, KY jelly and see if there is a difference.

Too much friction?: If you use lubricated condoms, you may not notice a need for more lubrication. When you do without the condom, be mindful of how much the vagina is lubricated. There may be more friction which leads to bleeding. If you need it, you use an over the counter lubricant. Try it anyway in fact