Hi Rick,
Assuming you had nerve sparing surgery, I think 5 months is still early days, your nerves will have had a bit of a battering. It took me a good eight months before anything started happening down below.
I think it's important to keep the intimacy going in the bedroom and try not to get hung up on the lack of erections, even though it may feel weird and off-putting. As others have said, have some fun.
I also agree with trying injections, I found them very useful for bridging the gap until natural eerections were up to the job.
Good luck,
Kev.