Some time ago I went beta on my 300% oneitis and now that we broke and I can't get sex from her I have trouble getting hard with other girls. When we were in a LTR I usually jacked it to pics that she sent me and generally random pics of us, because I had trouble getting hard while watching porn if the girl didn't look atleast a bit like her. Now I no longer have the issue with porn, it healed over time, but I still struggle when I pull girls. I can't get hard because they aren't her, even if they really are objectively more attractive than she was. Any advice? Should I start taking viagra? (I'm turning 20 this year and I ain't sure it would be a good idea) How can I improve the situation?