If you've been in a relationship for so long that you can't even keep track anymore, you know that things aren't exactly as new, mysterious, and exciting as it was when you were a fresh cute couple. In fact, they're downright weird and disgusting sometimes, when you're in a settled long-term relationship. It's all a sign that you're truly comfortable with the person who's been sharing your space all these years, though, and is, in fact, a real relationship goal. California-based comic artist…