Should I text my ex-girlfriend?

So me and my girlfriend(of two years) broke up a few weeks ago. It was a pretty amicable breakup, and I felt OK about it as I know it was the right thing to do. But a few days ago, it was our would-be anniversary and I've been feeling really down ever since. I don't want to get back together with her, but I feel I haven't had closure. I don't know what to do. I feel like texting her but my instincts say this is a bad idea. I feel like we could be friends, but I'm feeling very love/hate at the moment so obviously my conflicting feelings are confusing. I have a reason to text her(I found something of hers I could return, but I doubt she'd care about it). But the whole situation texting her is high-rish-high-reward as I don't know what she's thinking. We had problems which led to her breakup and she did some very nasty things(which I'm having trouble letting go) and it wouldn't surprise me if she hated me now. She may feel the same as me, or she may have moved on already, and being ignored or finding that out would kill me and make me feel worse than I already do. But I just feel tempted to get in contact, but I don't want her to think I want to get back together because I don't. But of course that's the obvious reaction. So I don't know what to do. All I know is that I am sick of feeling awful all the time and something needs to be done. I don't know if I want to talk to her just to find out what she's up to or if I genuinely do want to be friends. Should I leave it and never text her? Or wait a while and see how I feel(but I don't want to be pondering this any longer)? Or should I contact her?

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