If you were my daughter I would tell you to cut back to one horse, either lease the other two or sell. That will save you time and money. Take the extra funds and save up for your own truck to haul with. Don’t be dependent on a man ever.
Then set some healthy boundary’s with your BF and yourself.
A. Pick what days you will ride after work, 4-5 days is fine. Add them to a shared calendar and share with BF. You define your schedule not him.
B. BF should pick up his share of cleaning and nights to make dinner, his dinner nights should align to when you will be riding. If he can figure out a game system, he can work a dishwasher, oven, washer and dryer.
C. Go see a therapist and be prepared if he decides to walk after you make healthy boundary’s. And if he does, he wasn’t supportive or want the best for you and you deserve someone that wants you to be fulfilled and happy.