Does Diabetics in range of 300 average , can cause impotence or erectile dysfunction? I am suffering from Blood sugar since pas 6-7 years-My age 65+

and I am on Insulin 3 injections daily Human Mixtard 30/70,lots of care I am taking on diet. no mithai ,sweets, no rice , I find ROTI raised Blood sugar levels.
Lately my muscle is going and there is wieght loss of 3-4 KGS in a year,Over all I am becoming thinner in look.wieght loss can be stopped ?
BODY Pain or it is Bone Pain? how to get this diagonized? leading to TIREDNESS?
at times swaeting after meals,

NEED ADVISE