eternally optimistic

How much does it pay to be the eternal optimist? Is there a positive to seeing the positives?
In a world so full of instant gratification, why do we allow ourselves to get caught up on little things, such as a bad grade or even a bad romance? Why are we so prone to "on-again, off-again" relationships even after being raised on the idea that there are more fish in the sea and more frogs to kiss before finding a prince?
If love is blind, why do we have a "type"?
I start to wonder is my "optimistic" personality is just pessimism in disguise. I feel optimistic about someone, even through the worst of relationships, and I keep giving them chances to change. I wonder how many great opportunities and people I have let go for the sake of getting back in to a drama-filled relationship. Am I really optimistic about this person, or am I pessimistic when it comes to believing any other love is out there for me?
I believe there are plenty of frogs out there left for me to kiss before I find a prince; not everyone gets to have a Cory and Topanga romance. But how many frogs do I even give a chance to if they're "not my type?" Am I being optimistic in that I believe a perfect guy is out there for me, or do I shoot them down before I ever even consider the possibility of love?
In the end, how pessimistic is optimism?

confessions...

I am completely and totally in love with a guy who doesn't know I exist. The only reason I ever fell for him was because he was always there and I gave up on every other person I ever had feelings for. I even went to the same school as an old love just for one more year to change his mind, which I didn't do because I never had the nerve to talk to him and work things out.
I pretend to be an eternal optimist, when in reality I'm about as pessimistic as they come. I don't believe in love. I don't believe that friendships can truly last a lifetime, past all of the life choices that are bound to change you. I don't believe any one like me can ever be loved and I don't believe that men are ever truly capable of loving anyone in the first place.
I don't believe there is such a thing as a genuinely happy relationship. I don't believe that everything happens for a reason and that you'll be happy it happened one day. I don't believe that the terrible things that happen in this world can be overcome.
There is no reason for this post. There is no rhyme or reason to why I decided to share these thoughts with other people. I just feel like there is no way to explain why I think the way I do without explaining what it is I'm thinking in the first place.