Women love romantic gestures. Do some sweet shit tonight like break in her bedroom window while she's sleeping.
Make sure you bring a boombox and have your favorite Boys II Men song queued up.
Any song will do as long as it includes a spoken aside by former member Mike (Bass).
Stand at the foot of her bed and make sure you stick the landing on whatever Mike's simpass "Baby I'm Sorry For What I Did, I'll Never Hurt You Again, Please Come Back To Me" speech happens to be for this particular song.
If she hasn't stabbed or murdered you by now then you're back in there, B.
But if she still plays hard to get after all that, just descend upon her and eat her ass until she loves you again.
You're welcome.