Early months of dating
There's no way lingering eye contact has the power to reveal much about a person's inner peace or turmoil, how they take their coffee, the status of their relationship with their mom.
A lot goes into long-term attraction and romantic rapport. I'd wager about a month into dating someone, though, you have a decent shot at accessing what can and probably will happen in the possible LTR scenario. So you can figure out if this go in the dating arena will likely sink or swim—whether or not it's time to adjust the sail for a lengthy cruise or take a deep breath and abandon ship now.
Does a harmony still exist while vertical for longer than it takes to pass a club line? Conversely, you gotta make sure what you're starting isn't just a super great, platonic friendship (which are needed, too, duh). If it cools right away—as in, one month in—that isn't super promising.
Make sure you two can still enjoy each other while doing activities that don't employ alcohol and darkness.
The idea of love at first sight as a possible thing that happens gives me very real anxiety. Sure, lust at first sight is totally reasonable and an event I have encountered firsthand.
It can spur a glorious night or string of nights involving super hot, sweaty fun.
Listen, it's pretty easy to spend insane stretches of time in bed when you just started dating a new person you're crazy about, lost in Netflix, delivery, and frequent pauses to bone.
But when you don't have the laptop or sex as a crutch, how do you actually dig the other person's company?