Can porn cause emotional bunting/inability to love a partner/empathy reduction/difficulty to be romantic?

Altered perception: Watching pornography may affect your perception of what a normal sexual relationship is like, which may decrease your libido if your actual encounters do not live up to your altered expectations.

Yes: Pornography has shown to have adverse psychological effects when watched in excess. Reduced ability to love a real person is another symptom as no one can live up to the ideal on the screen. However, these issues are treatable with psychotherapy and seeking out a therapist who is experienced in this area is generally recommended. Watching as little pornography as possible also should help.