What to do? how to keep strong? Girl not intrested in relationship.?

Im kinda depressed. A girl i really like,is not interested in relationship,she says she is scared from relationships with anyone because she has been hurt.but still she says she loves to talkt to me,and she is attached to me. But recently we argued,and she became really cold.latter she confessed that her ex started contacting her,she however said that she doesnt want relationship with him.

I got angry about that,because she pushed me away when he showed up.and told her were finished. A bit latter her friend texted me asking if i have done something to her,because she was crying.

I texted her in evening and we kinda talked it out.

I said i will tell her tomorrow,if i decide to stay.

Today i texted her goid morning to witch she replied with only hy and later i texted her telling that i eont leave,she havent replied.

The biggest problen is she acts like asshole and uninterested when i text her,but when i start to act like im going to disapear she starts to show interest,and even cries. Is she just manipulating with me?