How should I talk to him about this?

Haley
I have a disabillity that is basically an arthritis and it affects my joints and it's noticeable in the way  I move because it is not as fluid. I have been talking to a guy for about 5 months that I met online and I told him about it but I don't think he gets how bad it is. And tonight I had a low point self consciously and I really just want to talk to him about it but I don't know how since I don't think he understands the extent of it. Also I wanna go visit him soon but I don't know how to bring that up either? How should I do these things?