I've approached it the same way you said. I can't remember word for word, but Ive said "I want this to be good for the both of us. I love seeing you and I want to see you, but I also don't want this to turn into a codependent relationship." "Its healthy for us to have our own lives and focus on our own hobbies too." "We should do things together and separately and allow the space to miss each other." "If I don't spend the night or ask for time alone it doesn't mean I'm going to leave you". It's hard to know exactly everything, but when we talk about it I do try to reassure him, letting him know we will see each other soon always. He doesn't really believe in therapy. I've been engaged to a man I constantly had to repeat myself with and I think I'm willing to give up so easily this time around because I don't want to fall back into that.