Not a parent figure to fill needs that were not met in childhood. Use friends or counselors to meet those needs. If so, dig deeper and investigate your difficulty loving or making commitments.
Excitement can be a way of avoiding underlying feelings.
Then ask yourself how that makes you feel. Listen to this internal message bearer. No matter what's going on underneath the surface, you have to listen to this serious little messenger. One of the important components of a healthy love relationship is self-knowledge. Before you can decide wisely about marriage, you must learn about yourself as an individual.