Why is citruline bad ?

I have somewhat been struggling with erections due to gooning , I am in my early 20s . I decided to take citruline and I could really see results but a peater told me it’s really bad for long term. I really need a fix for this issue , it’s affecting my confidence irl. Ironically I am the one lately to ask the girl to “take things slow” , what is the quick and long term fix for this problem? I haven’t been getting morning wood since a long time and I can’t stop gooning before sleep . I really need help . Citruline seems to help