Optimism vs. pessimism

Alright, so there are some people that are really hard to deal with sometimes, but they are your friends and you want to be good friends to them no matter what. You know the people that I'm talking about. Oftentimes these people are overly optimistic or overly pessimistic. So I think it's good to see the world for what it is...see the good in things, but if things are bad don't overlook the situation. Back to why I'm here...I have no problem telling people how it is. If someone is going to ask me for advice I will try and tell them what I think as straight as possible, without being completely tactless. So tonight when a friend came to me with a few life woes I tried to console her, tried to tell her what I honestly thought. That yes, things might be shitty now (since it was a guy problem) but that everything happens for a reason...if she is not with this guy, that means that she will probably stumble upon someone better and be thankful that she didn't stick with guy #1. I understand that when people are in a rut that they often do not really care what advice you give them; they are just going to sit there in their misery anyways. But I get very upset when someone asks for you to be a good friend, you try to be a good friend, and they throw something back at you like "ahh yes, the optimism of one involved in a new relationship, refreshing indeed." Hmm...how can I work on being crass enough to come out and say things like this: "He dumped you because you say bitchy things like THAT"