Hi I had gone through your query. 1st thing you have to do is go for penile Doppler to know blood flow and chance of erection with medications etc. In old age need to rule out illness like diabetes and hypertension which are common cause of erectile dysfunction. Besides this Erectile problem has many origins 1st is life style stress and busy life style make u fatigue and secondary to this it makes less desire in sex and erectile problems. Take rest/healthy diet/avoid alcohol and smoking can help. 2nd is relationship free communicative and mutual understanding will help sex is mutual act so try to do mutually and tell your problem to partner this will reduce your anxiety and able to erect easily so stress free lifestyle and mutual communication will help Third is physical health Routine check up and fit physical health is necessary psychological soundness is musts It can be improved with Medicines like sildenafil,, tadanafil, tetrafol plus etc, do take advise from doctors Get well soon Thank you. take care