Knowing all these pieces of information, it is pretty easy to make variants on this phrase. Want to reply? Add on a aussi to say “I love you, too.” Using yourself as an object, you can also make the structure moi aussi, just as with the English “me, too.”
Want to mix up your subjects and objects? That's easy enough as well with the formula provided: Tu nous aimes, vous m'aime, the like.
Want to express a nonromantic, platonic love? Adding in a bien to the phrase will tone down the the phrase from its romantic connotations. Je t'aime bien will then literally translate to “I like you well.” A bit awkward in English, but it serves to express friendship in French.
You can also be considerably more creative in your romantic expression—it is the language of love, after all! While we won't get into more elaborate statements of affection in this article, by all means go out and learn more