Should I go after her now after many years?

Yes of course, if you really love her follow what your heart tells you. You know I met my wife thru a friend's group, then I joined the group later on. I have the guts to tell her that I love her altho she told me that it's not her priority that time. All of our friends knew that I'm courting her tho she doesn't entertained me. Time passed by (three years to be exact), then I came to visit her once again to tell her that my love for her never fades. And she accepted me, and we've been married for 21 years now. May be she's just waiting for your first move. Do it!