The best to tell if a guy's into you is, is his energy coming towards you or are you trying to pull his energy in?
He calls for no reason. He makes plans for dates. He wants to spend time with you. He even talks about the future. He says, 'What are you doing Saturday night?'
He's trying to get a sense if you're open to wanting to see him. That's some of the best signs to tell if a guy's into you. He's making plans because he wants to get you in his domain to spend quiet time with you.
Usually guys that come on too strong or too fast could be a warning sign that might just be into you for a one-night stand and not a long-term relationship. The best way to determine if guy's just into a one-night stand or if he's looking for something serious will be his pace
If he comes on strong, chances are he's looking for a one-night stand. But if he's taking his time and getting to know you, asking questions about you, spending time in a friendship capacity, chances are he's into you for something more than just a one-night stand.