Please check out the Diabetes Research and Wellness Foundation's website and go to the resources section.  The website is: drwf.org.uk/

Have you seen your Endrocrinologist?  What did he/she say?

you are on medication for 10 years. I am sure your doctors has given you sound advice on all aspects of living with diabetes. What have they told you?

It sounds like you definitely need to speak with your doctor or diabetes nurse for some advice. I would also ask to speak with the diabetes specialist dietitian for some help with food choices and diet, as you clearly need some guidance in that area. Don't be scared to ask them for help, that's what they are there for. What kind of medication are you on? What diet and food choices are you already aware of? Have you had any resources or cookery books etc. suggested before? Regarding the issue of sexual dysfunction, have you spoken with your doctor about this? It's a not-often discussed complication of diabetes, but a very common one. Your doctor will be able to help and will possibly make you an appointment to speak with a urology nurse. I hope that helps. 

As Activity2004 has suggested, DRWF have some helpful leaflets on Diabetes and Diet and also Diabetes and Sexual Dysfunction for men and woman. You can download the leaflets as PDF's or listen to them as audio files. 

The weight loss may be from the blood sugars.  What has your blood sugars been lately (100-300 mgdl)?  If your numbers are high constantly, some people can start to loose weight and the food doesn't work correctly.  Has your doctor spoken to you about this?