HELPP SO SAD

Ive posted in other groups and when i found this one i thought it was perfect. So me and my bf have been dating for 10 months wrre 20 yr olds and these past few months he has not been able to stay hard during sex. Sometimes its okay other times its not. He stays hard and comes from oral always but when it comes to actual sex it varies. This makes me so upset and gets me to think im not good enough, i dont satisfy him, im not pretty enough. And he keeps saying its not that at all. That he wouldnt even get hard to begin w if that was the case. So we research and came to find too much porn can cause this and he stopped watching and we stopped doing anything for 2 weeks almost to restart over. But the first times after he still couldnt get hard. We went to a doctor and re ran some test and aaid everything was perfect and he doesnt think its the pron. (even though online thousands of men have reported that not watching porn helped them and got them back to normal) what throws me off is tbag this never happened w any other girls. He says that with them it was only a one time thing and this is different cause we have steady bee doing it for a while now. And then he also told me in the beginning that he didnt watch that mych porn(and this didnt happen) and he increased to watching it basically daily and multiple times in a day sometimes. Which made me wonder why? We did it basically every day to every other day... and he keeps telling me its not me and that he finds me attractive and i do satisfy him but my head keeps twlling me i dont and that he doesnt even find me beautiful... idk what to do. We broke up today because if this. And idk if i was selfish for doing that. Ik if it was me who wasnt able to have sex he would wait and be there for me.. but idk why this happens and it kinda messes me up.