why swollen Vagina lip?
Do you have a women’s health clinic around? Something like Planned Parenthood? They can help with general gynecology issues, not just birth control.
It sounds like your boyfriend is being clumsy down there. He needs to learn to open the lips and push them to the side, not just tear them if they happen to be in his way!
You have an obstructed Bartholin’s gland. Sit in a tub of water just as hot as you can stand and gently clean yourself with soap and water, then just soak for a while. This will help to unclog the gland and get it flowing again. You can also put an ice pack on it for twenty minutes every hour, this will decrease swelling and numb the discomfort. IN future, tell you boyfriend he is damaging you and needs to be a whole lot more gentle, and he needs to wash his hands before he touches you.