I've been running for about 5 years now, and when I first started I was just like you. It was really hard for me, because I motivated a few friends and family members to start running too...and they were all faster than me. SOOO, I decided I'd just run for distance. I was pretty pumped up when I ran my first half marathon! It wasn't fast, but who cares, right?
I've noticed I've sped up and slowed down over the years too. I ran a full marathon 2 years after I started running, and I ran that race at a pace almost 1 minute FASTER than my first half marathon pace!! But, I've also ran 5Ks recently slower than my first races...so much goes into each run that changing any one variable can greatly affect the outcome.
My advice, just give it time, and find what motivates you to just keep going at it. Its easy to get wrapped up in pace, but those who enjoy it for the sheer act of it, will stick with it a lot longer!
Patience and Fortitude - Mom
There ain't a thing I've faced that's been too much for me - Classified "Inner Ninja"