So I've been with this guy for 6 months. I met him in the gym. He's the owner and personal trainer there. We started dating and were totally happy. At first I had no job so I could come and see him at the gym whenever I want. 3 months later I started to work from 9am to 6 pm and got tiring to go see him every day. He spends most of his time at the gym practically from 8 am till 10 or 11 pm . And in free time he always helps his friends in their home constructions and everything they migh be in need of. He is amazing. But I don't see him much. I know he likes me cause he spent two years before me single. And I was single before him for 3 years. He's 30 yrs old and I'm 23 yrs old by the way. Anw I started demanding him to give me some one on one time with him cz in case we are going to go somewhere with our relationship , we won't get anywhere if we don't see each other and talk as much. So after several times, even though he said he'll take care of me and that he cares about me, he asked to keep our relationship at a friends level and see where we're going to go from there. He said he can't forgive himself if he's the reason that I'm upset. So I said to him to do whatever he wants I don't care from any talk cause it's the actions that should be evaluated. He kept calling me each day for 2 weeks, and asking me to come down to the gym cause I must keep on training, but I didn't answer much often. Until I got one day to the gym to train, he kept following me from machine to another and trying to talk to me , I wanted to keep on talking to him but I said that I don't like to talk much while training cause it's exhausting. My friends there saw that he's frustreated somehow and for now we've been apart for a month, couple of days ago he called me at work and told me that he misses me, but I took it as a casual talk, and ended the conversation by can't talk cause I had a meeting. He didn't ask me to go out. And I don't want to look like I'm going to the gym to see him. What should I do to let him come to me on his own. If anyone can help or advise

He is a 30 year old man with a job that you have been dating for 6 months and you are demanding he spend more time with you?
If he wants to see you he will when he has time. Perhaps his lifestyle is not conducive with yours and with your demands maybe he sees it's not going to work for him.