1. Stick around her (like in her class) even when your job is done.
2. Message her when you are with your other friends without any important thing to sah.
3. Tell her to message when she gets home (in daylight and her house is like 10-15 min by bus)
4. Want to be in 1 on 1hangouts with her. (Not be eager when others join in and most of the times find a way to end having some alone time with her)
5. Be protective over her when in street and cars passing by.
6. Pay for almost everything.
7. Stand up for her
8. Never mention being with other girls and if you happen to run into one explain that you are just friends without being asked.
9. Want to be paired up with her in almost everything.
10. Help her in any way possible and say you are available if she ever goes through a hard time and wants someone to talk to.
11. Even though she has difficulty talking in your mother tongue fluently you are patient with her and don't rush her at all.
These are the behaviours I have seen from my guy friend whom my friends think likes me, so I got curious.