I, as well as the rest of the world, can tell you how to love, but never who to love. That is entirely left to your discretion. I'll add my personal belief that it is determined by your loved ones. So, maybe I am a self-proclaimed theorist and I stand firmly behind my idea that we fall in love with a person whose collective characteristics are that of others whom we love. Haven't you ever noticed at varying points in time your partner reminds you of someone else you hold near and dear to your heart?
In any case, I'm really here to tell you not to let anyone else condemn your choice. One does not have to agree with your decision in order to respect it. Respecting someone's choices is one of the best expressions of true love. Not everything that suits you will suit those around you. This is beyond acceptable, freedom of choice is to be celebrated.