Hello, well Id be upfront with him about this whole situation then dancing around with this. Personally, as a wheelchair user I got use to not having someone’s romantic intentions, then when the time came and someone was interested in me. I got confused and wondered why was the person interested in me. So, he just may be confused and a bit scared and may be pushing away. he may feel inadequate because he’s a man in a wheelchair, you know it may make him feel less of a man. Perhaps you can make him see that you don’t see that chair but only him.