Me in a Nutshell

Hi everyone out there. I am writing this blog to vent and get advise about my life in general.

A little bit about me: I am only 20 and have been dating my boyfriend for almost 5 years (started May 22, 2009), we have a dog together named Jax, and we are currently living together while finishing up college. 

I am happy with my life most days; sometimes I feel like I am living beyond my years and it scares me. Everyone tells me that my relationship resembles an old married couple - that scares me. I don't want us to lose the romance so early, I mean we aren't even married and I know there is less spark between us. 

Our dog was his idea, though I was not opposed to it, I feel like I spend the most time with the dog and take care of him the most. For example, I came home from class the other day and the dog was in his kennel because my boyfriend couldn't "handle" him any more. Mind you my boyfriend was upset because classes had not been cancelled due to weather (he still didn't go to class because he thought it was dumb that class wasn't cancelled). The dog just hit 5 months himself so he has a lot of energy and chews on everything. Am I paranoid when I think this behavior will translate to if/when we have kids? I mean babies cry and don't listen; the dog just gets into everything and doesn't listen and he "can't handle it." Today, the dog went to actively bite my boyfriend; I agree that this behavior should not be condoned and the dog be punished for it, but he wanted to put him in his cage for 6 and a half hours! I think that is excessive, even if he was being a bad dog. 

I wish I knew how to tell him these things without sounding mean or passive aggressive; I just would hate to be the fighting couple everyone knows. I just wonder if I am being too passive or too nonchalant about things that bother me. I guess I am looking for advice but also just someone/something to vent to. All of my female friends are either away at college or too busy to hang out. I admittedly do not make good friends easily and I have a problem with excessive girl's behavior; I guess I am looking for an outlet that is safe but helpful, and I hope I can get that here.

I would be happy to get some constructive input, but if no one ends up reading this at least I feel better. I needed to get this off my chest and out in the open; even if it does not go to the person I truly want to tell all of this to, it is out there and I was able to reflect on my feeling - even if it is just nonsensical rambling.