My first 1/2 Marathon

In November both my wife and I will be running a 1/2 marathon with her mom running a marathon. This will be by far the furthest I've ever run. Am I excited? Hell nah but at the same time hell yes! I'm nervous about pushing myself that far but, I know it can be done. My wife's family runs consistently and has gotten me back into running. My older brother ran track in middle school and high school and was pretty awesome at it (I believe his fastest 5k was around 18 min and that was in the 8th grade!). So its not something that's necessarily brand new to me. We have been training pretty consistently here lately with our runs currently at 5 miles, 5 miles, and 8 miles for the week. I struggle sometimes to complete this like yesterday I only ran 3.16. Sometimes running feels good, kind of a stress relief and sense of freedom. At other times like yesterday its a grind and I struggle mentally to get it done. I know I can do it but I just have no motivation. I'm wondering what do other people use for motivation when they run? Do you run? If so, what have you run (5k, 10k, 13.1, 26.2)?

Comment and give me that upvote! Let's hear from some runners!