Eh, I think he's kind of good looking. But then there's the makeup and everything, and he gets kind of weird. Not weird in exactly a bad way though. From what I've read (I haven't watched any videos of him except the trailers), he's shaping up to be one of my favorite villains. I just wouldn't go out with him. :p
In regards to him actually having a love interest, I'll have to agree with Djinn. He doesn't seem like the type of villain who would have a real love interest. Actually, there aren't many really good villains who would be capable of real love. Supposing Ghirahim did have some form of a love interest, it would be really one-sided like Djinn suggested, which kind of reminds me of the relationship between Voldemort and Bellatrix Lestrange - of course, part of Voldemort's character is that he can't feel love, but from what I've heard of Ghirahim it seems something similar would apply as part of his personality, though on the whole Ghirahim is a lot more flamboyant.