Life is just too short

I have come to realize that sometimes in friendships you put way more in then the other person. Why is that?? How can I put some much effort into a friend for that not to be reciprocated? Then when things are good or even not so good with me I can't share because frankly the support isn't there. Well, I'm done doing that!! It just sucks to have to come to such a conclusion. Life is too short to sweat the small things, ya know?