Am I wrong?

So my "best friend" who I've shared 5 years of my life with went behind my back and told my boyfriend (who I've been with for over 3 years) that "he could do way better than me", that "he deserves someone better than me" and told him that "she is just depressed right now while going through this rough time and she just needs to feel something from someone at least". This was around the time that it wouldve been the 1 year mark since my younger brother committed suicide! So needless to say I kicked her to the curb and called her a bunch of nasty names! It's been about 3 months since and I decided that I was going to get this tatto that the both of us liked when we were friends. She then contacted me about it bitching saying that she wanted it first and that it meant something really special to her! Am I in the wrong for getting the tattoo! I really need help here so if you could please respond it would be much appreciated!! 
Thanks you :)