Getting myself into sticky situations..

im usually the type of person who ponders the natural ignorance of human. that being said, i cant really explain why im going to do what im gonna do tonight.my significant other and her ex split not too long ago. i know shes my soulmate and i am hers. ive known her for more than half my life, im only 21 so it feels like a long time. she is completely over and disgusted with the ex, but still they seem financially bound. she has to make huge payments on an overly expensive appartment, and they both seem to be invested in this. they were living together but not anymore, the ex seems to be staying with his mom. so i am invited over tonight, to her place. this guy still has a key to the place, and im sure half of the material shit in the appt. is his. basically i know things are going to get hott, she wants to bathe together, sleep etc. ami crazy for even putting myself in this kind of position? i must be the guy all your friends hate, the guy who thinks its hott to be with anothers love. i kno the ex would be thinkin of killing the guy whos fuckin his old girl... i kno her ex isnt over her, and he might drop in to see if shes there, and when he does ill probably be naked in her bed. any comments/advice?? should i bring brass knuckels? hehe... i want to say im joking bout that but i dont feel safe i kno this. im not scared, and it almost seems as if im subconsciously picking a fight. why else would i go near an area where this fool could possibly be? anyway, i love her and she wants to me to be with her, and i will.