I am not a "runner" I suppose, but I think I'm on my way to becoming one. I run almost exclusively outside. Occasionally I have to run on the treadmill, and I really can't do more than 2 miles before I am just mentally finished.
I started out running/walking, then when I got to the point that I could run for 2 miles non-stop, I started just doing that and then adding a little (maybe half a mile) to my runs each week.
Now my runs are between 3-5 miles, 2-4 times a week, and then one long run on the weekends. My long runs are anywhere between 8-13 miles, depends upon the heat and how much time I have. On my shorter runs, I try to stay under an 11:30 pace. On my longer runs, I typically stay around 12-12:20 pace. So I'm not setting the world on fire with my speed.
Sometimes I listen to music and sometimes I listen to podcasts. I can't zone out when I listen to a podcast, so I typically save those for my shorter runs.
Once I hit the ability to run 4 miles, one day I just decided to see how far I could run. I hit 8 miles before I felt like I was going to really, truly hurt myself. Since that time, I just started doing long runs that even 4 months ago I would have never thought I would actually be able to do. I still have to psyche myself up each time for it. I don't ever think "I've got 10.5 miles ahead of me." I think "Okay, I'm going to run to the levee (2.25 miles)." When I hit that, I think "Okay, I'm going to run to the 3 mile mark." Then "Okay, I'm going to turn around and run back to the beginning of the levee." And then "Okay, now I'm going to run home." If I break it into smaller increments, it doesn't seem as overwhelming or impossibly long.
That first mile still sucks. I don't know how long I will be running before that first mile just isn't the worst thing in the world. Once I get past mile one, something clicks in my brain and then I actually kind of enjoy it. But getting out the door, and then running that first mile is still mentally and physically very difficult for me.
I have started and stopped running programs a million times. I don't know what is different about this time around. One thing is that I've gotten past the point where I care if I lose any more weight. Of course I would LIKE to lose weight. But the accomplishment of running itself has become the goal. It's like running has become a nearly separate category from any weight loss goals. When I run, right now anyway, I'm not thinking "I just burned X calories". I'm thinking "Oh, today I feel really good. Maybe I can run these five miles in less than 58 minutes."