In the range of 95-100 degrees Fahrenheit is where a lot of your more vicious bacteria thrive.
If she loves you enough to give you sweet tea, Darth, then it's love. If she gives you unsweet tea, then it's just her feeling pity on you because she thought you needed something to choke that turkey/bologna/banana sandwich down with.
Well, I guess it might be love too, if she gave you unsweet tea, but only if she knew that you only drank unsweet tea. I guess you would have to know her motivation. Since most people don't publish their taste for tea or brag about it verbally in work situations, knowing your taste in tea probably required some effort and research (like asking your friends, or perhaps breaking into your house and drinking any tea she finds in your fridge, in order to check for sweet/unsweet). In that case, given the illegalities she's involved herself (and you) in, it might not technically be 'love' yet, but she's at least 'smitten' to research what kind of tea you like. Especially if she broke into your place to do the research. She might have a dossier on you. Or maybe a tumblr page.
BTW, are you an Elvis impersonator now?