It will get easier. It just does. Of course, you can help the easier part along but some things just need time.
For instance, when I was married part of my wedding sucked and it was the example used by family and friends to learn from. It took a couple of years for me to be able to see a wedding without bawling my eyes out and feeling bad that my wedding had sucked. At least in some way it did to me as the 22 year old that I was. Anyhow, I did get over the sadness and got into the swing of actually being married and thinking, well, the wedding may have sucked but the marriage is more than that. Of course, time now has shown otherwise but that's water under the bridge. My point is somewhere in that mess, I was able to see bridal couples and feel excitement and happiness.
And men too can be just as confusing. I don't know what your coworker issues was/is but ride with it if she is flirty, relax and just have some fun.