I think a certain degree of venting is healthy! But I do think it's good to proceed with caution to ensure you're speaking to the right person about your issues/complaints/vent topic. For some things (like a relationship) it's best to seek the advice of a non biased third party and not to complain to your friends and family over and over again. You don't want your family to have a negative impression of your partner, right? Healthy venting is good if it helps you let go of things that stress you out! I personally like to get my bad energy out by doing art or exercising. Sometimes I want to cry and talk to my family about things that bother me though :P It's not weak in my opinion!