The negative feelings you had for someone have improved so much that you are starting to feel like you’d join their fan club if they had one! The exciting part is that they are singing your praises just as loudly. The two of you are on good terms, and it’s a victory you both fought for. You have grown from tense acquaintances to friends and it’s something to celebrate. Consider moving your relationship into a more social arena and building on the foundation you’ve created together.