Get high on crystal meth and pcp and then head over to her place, riding your BMX bike and wearing a vinyl gimp suit and ball gag.
Chloroform her fucking punk ass and then while she is out, duct tape her hands together to a towel rod in the bathroom. Then cut her clothes off with scissors and clog the toilet with them. Then shit and piss all over her (assuming your gimp suit has the proper openings available).
Look through her fridge and cabinets to see if she has an marshmallows - if she does, take handfuls of them and press them into her eye sockets and then tie a strip of torn fabric from her clothes around her eyes and then duct tape that taught enough that it looks like there is barely circulation there.
If she has any fruit in the fridge, throw it at her and watch how it bounces off her naked flesh and watch for any movement on her part.
If it looks like she is coming to, shove a tomato or some bread in her mouth and then wrap some more clothes around her face.
Smack her around and then fuck her in the ass.
If you start to feel your buzz wearing off, then steal some of her clothes and wear them home and take a nap.
If all goes well, I would imagine you could pretty much count on being married within the month.