Getting ex after NC

Hello guys, so its about 50 days since my GF broke up with me. First week i tried to go out and just talk about it but without results … she ignored me. So i decided to use NC rule. It’s 40 days since i started NC rule and yesterday i contacted her first … She responds neutral/little positive but at all it was a neutral conversation from her side. We got a 5 line conversation about school. First message was a “good reminder” message. I reminded her a good situation about us. Then few messages about school and after that i decided to end conversation. I didnt want to go boring and as i read, ending conversation give me a little “power”. I text her, that im glad she’s doing well with exams and that i have to go out … later. Now i have mixed feelings about that.
Can anyone help me what and when to text her again? And how to get “closer” to her and have a fine, friendly and funny conversation?
I apreciate everything. Thank you.

Is she seeing someone else? How bad was your breakup and why did you breakup in the first place? Without further information, it’s hard to give you customised advice.

Well, i Dont think, that she IS seeing someone else but it IS possible. Our breakup was … Last 2 months we argued twice a week but About non sense things … The Day before breakup we had BBQ party at her house And suddenly she started to getting angry with me and she doesnt talked to me. We decided to go to the pub. She wasnt speaking to me, she was running out of me. I tried to catch her twice, but she still was running out so i decided to stop catching her … Second day she just broke up with me and told me, that i walked out of her and that i dissapointed her, that i have to delete her from my life and things like that. So …