I have struggled with this before. Honestly you just havw to find some enjoyment out of it. Give yourself a goal and work torwards it. Find a program that works for you and doesn't make you feel like death everytime. Being sore for more then 48 hours is actually detrimental to your muscle development. It's good to go hard, but if you go to hard you'll end up hurting your progress and it's just not fun anymore. I go 5 times a week for an hour at most and focus on certain muscle groups. I have actually made alot of progress over the years. I hope this helps you like it did with me:)