Please please help, cut vagina!!!

Hello all. I have been reading a bunch of things on here that are similar to my situation but not quite like it. I don't know what to do. I really need advice, because I feel like this is ruining my life!!!

Okay, well about a month ago I started experiencing pain when having sex. It went on for about a week, I thought I was just sore from previous times so I thought nothing of it. It was always in the same spot, on one side of my vagina, directly outside the entrance. Finally after one week, it hurt too bad and I knew something was wrong. My boyfriend checked and said there was a small cut/tear right on the top upper corner on the entrance to my vagina. I have never had that happen before. We had been having sex for three years, multiple times a day, long periods of time, etc. So I'm not prone to tears, this is my first one.

Anyway, I checked online and read that it should heal in about two to three days. We waited about five and couldn't see it, and when we had sex it reopened. This has been my life for the past month and half. We waited a week, and then two weeks, the longest we've waited is three weeks. But every time we think it's gone, it still opens. I hate it. My boyfriend said it's probably because of the spot it's in.

So, to treat it I have tried neosporn, I use feminine wipes every morning and night to keep it clean and only wear cotton undies. I didn't see a doctor for the first few weeks. It is not infected or anything. However, I did go for my yearly check up and he didn't even see anything there. I figured it was healed, but when I tried to have sex again, it opened back up... I haven't been to the doctor since though.

I just need any advice I can get. I want it to heal completely. It's really not that bad... every time we wait a week or so, the first time we have sex does not hurt at all. It opens slightly. It always bled at first, but now when it opens, it doesn't. So that's progress. But any consecutive time I try to have sex it stings and hurts. It never hurts when I'm not having sex. I am doing everything I can do heal it.

Can anyone suggest a timeframe when it will be healed COMPLETELY and not open again? Or will it be like this forever because of the spot? Any other creams or anything I can use?

Thanks, and please help.