Long story short, ex girlfriend left me for someone else. I went NC right away, she texts me a month and and a half later bascially asking how i am and bringing up happy memories. I kept it short, stayed upbeat and positive, acted if i was completly unaffected by the breakup. I kept it very brief and ended the convo on my own terms saying i had to go. She seemed upset. Where do i go from here? Do i let her contact me again? Do i text her? I don't want to come off as desperate or needy and especially since i think she's still dating this dude, i don't want to ruin my chances.