I'm pansexual, so I don't really judge anyone by what they view themselves as, so that being said yes. As a person or as a pony it wouldn't really matter to me if we became attracted to each other. They aren't just clueless animals, the ponies have their own thoughts and intelligence just like humans and can give consent unlike a dog or actual pony. I believe if these ponies were real, our worlds connected in some way, and we could clearly communicate with each other I don't see why not, humans and ponies being together. I would be able to start a relationship with a pony just like I would with other intelligent lifeforms(like Mass Effect or Halo).