xLIZA
I'm sure she knows that you have this problem, right?
If you haven't yet, just talk it through with her, and tell her your concerns.
Tell her that you're worried about hurting her or upsetting her and I'm sure she'll understand and be thankful that you're being so considerate of her.
And even if down the track something does happen you two will be able to find some sort of medium and resolve anything.
If you need some sort of release for the tension that's something you have to work out for yourself; what works for you.
I don't really have any suggestions, but you can always just take a minute to yourself to calm down or relax. Welll this is the thing, she does know about all this and she does know I'm quite an angry person anyway. But beleive me, there are times when keeping my cool isn't all that easy. I don't know I think I'm heading for another psychootic episode, thank christ winters nearly over though, it'll be easier after all that.
As for emoness, inanimate objects are fun, I know, but as I said, I'm running out, and with not living near a big feild or foressted area anymore its alot harder to find somewhere to let me release my aggresion physically without hurting someone.