Opening Up

I have recently come to realize that for some reason lately I have not been able to open up as much as I use to. Just to clarify, I personally hate opening up but sometimes you just need to do it for the sake of all of the people around you. If your holding things in then it builds up tension in you that you then take out on everyone around you. I have experienced this and it makes me feel really bad because I hate treating people bad especially when they havent done anything to you. I majorly need to work on this.