Guys are simple yet complex..
If he is not into you:

1. He wouldn’t initiate contact (calling, texting, emailing or taking time to see you). That’s the big one. This is a huge red flag that this guy is not into you. No matter how busy, if he likes you..he will make time for you.
2. He ignores your calls, texts, messages, etc..

This is not a long list but if this two things happen; forget it.. He is not into you.
Best thing to do:
1. Don’t msg, text or call (this only makes you look desperate)..
2. Move on, God has someone better.
3. Take this time to love yourself. Loving yourself is the first step to true love..