Never gossip! Nothing good has ever sprung from gossiping and, for the most part, it is reminiscent of a coward’s strategy in discussing matters pertaining to people who are not present, and passing only negative judgments that they may not be brave enough to share in their presence. This behavior is certainly outside of the context of love.
Speak well of people to promote love for them. If you have something negative to say then hold your tongue. There is a better way to turn that negative into a positive aspect, thus promoting love within yourself and the person you have a negative sentiment toward.
The next time that you have a moment to speak with this person, you may want to try to have a dialogue. Very lovingly, and with an aura of constructive criticism in helping the person realize how they can shed their ego, present them with the concern you have found. Allow them to embrace the issue and reflect on it in such a manner that only positivity can stem forth from this discussion. Once you have communicated the concern, they have responded, and you have both reached a resolution as to what path would best allow you both to reach a higher plateau of love together, you can rest assured that you both have now shed a little more of your ego and moved closer to the final destination on this path to love.