I feel lost at such times and couldn’t focus on what someone else is saying like in lectures

I feel addicted to porn and games as well. I feel weird when I’m not getting either one of these for a long time and I don’t see any way to get out of this. But I guess games addiction is still not that damaging to my mental health unlike porn where I start to fantasize intensely even if I get slightly distracted with such feelings. Then I try to make an elaborate scene in my mind with all sorts to kinks or fetishes that I like until I get enough dopamine out of it.