I tore my ACL skiing 7 years ago, and even though it's repaired and I wear a brace, I'm still scared...?

I really enjoy skiing and want a little bit of a challenge. I've never been a black diamond skiier, nor do I really want to be after my injury. I used to enjoy skiing blues because they were challenging enough to keep me entertained but not stressful. Since I got hurt I've been too nervous to ski anything but greens! I am worried I'm going to bust my other knee or something.... can I get over this? I'd really like to resume skiing the way I used to.