Is it normal for me to still think about someone?

I had a female friend that I worked with who at the time was above me in terms of management. We talked nearly every day and had a real "strong" friendship that was sexually through the roofs as well! I told her my feelings towards being with her and wanting to consummate our friendship. She tells me I'll never get with her, but went back to her ex and "confided" in him. Now mind you I was helping her out, financially and emotionally. We spoke off and on for awhile but recently I mistook her call for another woman I frequently visit. I tried to apolize and explain the mixup but she wasn't having it. My question is, am I normal for wanting to still reach out and have her as a friend, or should I just accept the events in motion?