Nope. You're just teenagers having fun and growing up.
It would be a mistake to try and turn this into "the love of your life" because neither one of you are mature enough to know who YOU are and what YOU want in a mate for life. You haven't lived long enough, learned enough, or experienced enough.
Youth is best used as a discovery process.
After you have completed your eduation, chosen a career path, or learned a marketable skill, dated, and traveled some then you'll have a better idea of who is "the one" for you.
It's not about "Does age matter?" It's about (knowing) what you want that matters! 18 and 16 is too young for anyone to know what they want. At those ages it's all about just having FUN.