Ok, I am a 18 year old male and I masturbateed?

quote alot over the past i dont know maybe 4 to 5 years and now I dont know if Im suffering from ED I mean I can get it up and sustain an erection but from time to time I can't but its a on and off thing like if i dont masterbate for a day then I could definitley go at it, but if I masterbate I might have to wait a few hours before being able to fufill an erecte can anybody tell me the symptoms of ED cause I heard that having ED you cant get it up PERIOD wich I can so I dont think im suffering; I would hink it more so of an anxiety attack cause this is my bestfriend turned girlfriend i've been trying to have sex with