Quicheya
I want to echo what has already been said. I do, however, have a question. Did you wonder why that neighbor relied that remark to you? I would have. I don't always respond quickly but as I mull over things, I would have come up with quite a few responses. Some have already been said. If I seem so slow, how fast can they go for 5 miles? Do they run 5 miles? Shorter distances it's easy to go fast, but when going for endurance one needs to slow down or one will have to stop. Next time a neighbor or someone says something like that stop them and ask them why they are saying it. Are you trying to hurt me? I've been working hard to improve my health and lose some weight. Are you resentful of that? Are you doing this to hurt me, because you must know it does? Did you stick up for me?
Let them know they can't walk over you with their words. If you throw it back to them, not nastily, but showing that their behavior is unacceptable. They will be ashamed even if they don't say it. They may even respect you more. You never know what their motivation is, but you can change how it affects you.
Others have mentioned that doing the same mileage day in and day out will get you in a rut. To improve speed wise shorten one of your runs and do some speedwork. Add it in gradually so your body can adjust. With any change it's best to do it gradually and cut back somewhere until your body can handle it.
Btw I have asthma, but not exactly overweight. I could lose a few pounds, of course most people think that. I run slow, sometimes 12:30 pace, sometimes slower. I've been running for years. My asthma keeps me back, but it would be pretty bad if I didn't run at all. I'm not ashamed of my speed. My competitive nature wishes I were faster, but I'm not and I have to accept it. I love that I run at whatever speed I go.
Great job on running, on the weight loss and on the lifestyle change. Get your daughter out with you. Make it something she would like. Run early in the morning when there isn't anyone out yet. Except, of course, other crazies like us.
Good luck,
Patty