Do you think this is why my immune system seems low?

I catch what’s going around and have also developed shingles. I used to not suffer much from cold viruses and the like. In the past, I was the one who looked after everyone else and if I did get a bug, I usually only got it to a minor degree and could keep going. Now, I seem to catch everything and I can’t seem to recover as quickly. I’m no longer with a romantic partner and have no family, other than my son. Do you think that my immune system is suffering because I don’t receive hugs or caring, physical touch?