Being happy is a very personal thing and has NOTHING to do with anyone else.
Running is a way for me to stress compress, a place where I can go to meditate, and reclaim my thoughts. Some look at this form of exercise as a chore or a dreaded task. I look at it as a blessing and I am grateful each day I am physically capable of hitting the pavement with the two feet God gave to me.
Becoming a successful hill runner is easier than you think. You just need to train properly and always listen to your body. First, don't attack hills on the way up. Our instinct is to be a hero and push harder on the way up. Do not do this! Settle into a comfortable pace, even if it is slower than what you are used to. The goal should be about getting to the top. It should not be about how fast you get there only to find out you have used all your energy and have very little left to finish your run.
There are many different theories out there when it comes to hills, and I have tried them all. I have found over decades of training, never climb too fast. Slow and steady works on endurance and you eventually get better every hill you climb. Do not race uphill, ever. I never force a push up hill my clients, especially in their first few months of running. Going up hill like a rocket waste energy. You will get tired quickly and your legs will fill with lactic acid from over exerting yourself. Hills become less daunting and will not "kill" you if you train properly and climb at a comfortable pace, slow and steady! Make sure you are breathing and that you are still able to talk. If you are unable to catch your breath or speak, slow down! Before you know it those dreaded hills become a challenge you eventually look forward to.