It's worrying if you
also have no motivation to do things other than socialize (study, work, leisure etc.)
Not making a diagnosis (it's just one possibility), but if you generally don't feel any emotion at all in life, you might have a dopamine deficiency.
I'd take a look here and see how many symptoms you have:
Low Dopamine Levels: Symptoms & Adverse Reactions
Porn addiction, like all addictions, is reliant on dopamine. Look up "Your Brain on Porn". "porn dopamine" would also be a good keyword.
Basically after so many extreme dopamine hits (like seeing more naked women than all your ancestors have in one day), you eventually need more stimulation to provide the same level of excitement. It's similar to a heroin junkie who ups their dose until they OD.
I wouldn't be surprised if you had many symptoms of a dopamine deficiency. Read here:
Low Dopamine Levels: Symptoms & Adverse Reactions