Painful sex 😰

I've been with the same guy for 2 years. He wasn't my first, but this problem has been occurring ever since I started having sex. It doesn't do it every single time, but when it does.. It's so painful. After going for so long, it starts hurting & I just can't enjoy it any more. It feels like around the entrance.. It is just begging ripped to pieces 😢 I've noticed that after having sex, I have like tiny tears all around my vagina. It's super painful & I can barely even use the restroom without it killing me. Does anyone else have this problem?? If so, what can I do to fix if?