My Boyfriend Hasn’t Come To Visit Me In Over A Year, But Has A Complicated Living Situation?

Ok his situation is that he is a single father with full custody. His ex has her son 1-2 weekends a month, supposed to be every other weekend but they usually get out of one weekend a month. Now she is handicapped from an accident 3 years before he finally asked for a divorce. He is living with his parents who are in their 70’s so they can get his 10 yr-old son to school and after school because my bf leaves for work before his son goes to school and gets home after his son 4 days a week.
We live 800 mi apart and met because I travel for work and was working at the refinery where he works. I have gone to visit specifically visit and not work about 4 times beyond that we’ve gotten lucky and I’ve had to work every 3 months there. But last summer I had asked if he could find time to come meet my grandmother before she passed, however, that didn’t happen. At the time he said he would come up with a time to visit and unfortunately he couldn’t come down for her funeral due to his son being in school.
And he has made plans for his vacation this summer to go with/take his parents to the place where they went on their honeymoon.
Frankly I’m tired of being the one to visit. I’m tired of him using his son as an excuse to not visit. I tried to get him to visit me from sept-nov in wyoming close to really great scenic areas. He tried to use his son as an excuse and I said bring him! His son and I are ok together. All I wanted was a weekend because that was the longest I was away from family and friends and I wanted someone familiar and I missed them.
I’m getting the to the point where I don’t know if it’s worth it, but don’t want to give up someone I love but don’t know if he loves me. He says he does, but I had to force that out of him. I feel like I’m the one who always pushes this relationship through. How do I find out if he wants to be with me? I want to move closer to him to spend more time with him and jr, but not if he doesn’t want to be with me in a more permanent manner.
Anybody have any advice or experience to share?