How to tell if a guy is into you? 1) They create opportunities to be around – they loiter or chat (but beware here, make sure they are not interested in your work colleague who sits near you or your best friend or sister!) 2) They watch you when you are not looking. 3) If you are out with a group and he is taking photos and you notice he takes more photos of you. Imagine you see a beautiful rose. You are walking along. Maybe you go and smell the perfume.