i just wanna know what can i do to get back with my exgf?

man,i think u have to try to keep your careness low,sometimes if u care about ur girl too much then the girl will think she's too important for u and u couldn't live with out her.once people had this thought in their minds,they'll become self-centered,they won't care about what people react about them.
careness is important but u have to learn how to control it.use it too much or too less,both will make the girl dump u.