Why when a guy that don't want love starts falling for some one and then leave because he scared of it?

He's never dated or has a past with a girl and it was really a struggle so a tip: earn his trust and open up to him about stuff u just wanna talk about like stuff your comfortable with(:be yourself!! I know for a fact that guys like girls who are not boring and have ALWAYS something to talk about but don't rush into to major flirting but make him kno your close cuz these guys (well your guy seems like he needs a close friend b4 bf and gf) and when u guys text tip:guys HATE when girls write stuff like "yea lol" no lol" sure lol" haha" c'mon don't be lazy write more cuz for them it doesn't feel like u like them it's like saying "your the least person I wanna txt"even tho u like them(:so keep him interested