Hanna, a 5K *is* much! Don't let anyone think otherwise. I have run 5Ks, 10Ks, 10-milers, and half marathons. I found that the longer runs are easier to do than a 5K, believe it or not. It's a totally different type of running - slow and long versus fast and short. When I run 5Ks, I push so hard I am running close to anaerobic zone (you know, that state where you feel like you are going to puke). If you can do a 5K, you're accomplishing something amazing, don't minimize it.
Sarbear, one of the reasons I slacked off on the running this past year, was I kept getting injured. My problem is I set goals and push myself beyond what my body is capable of doing. My running history is one long series of setbacks, starting and stopping due to injury. The doctor says it's fibromylagia, and that running is good for me but at a low level - no competitions, don't push it too hard. Stop if the fibro flares back up. (Actually he'd prefer to see me in a pool, but I *HATE* swimming - with a passion).
So this time, I'm determined not tracking my mileage or pace and I'm not signing myself up for any races. I'm just putting on the headphones and getting out there. Running slow, enjoying it, listening to my body, if I feel like walking a bit, I do. Taking it really easy. So if I can't rack up lots and lots of miles, I'll just have to be happy with wherever my weight lands, with this level of easy running. I suspect I can eek out at least two lbs to get to 110. Getting lower than that, may be more difficult.
As for the diet part, do you find it's easier to eat healthy when you are running? I do. They've always gone hand in hand for me. Except that I will crave salt - and I think that is a hydration issue.
Laura - I wish I could lose 2.5 lbs by end of August! At the rate I'm going, about a lb a month, I'll be at 110 by early October.