Cant get over ex

She broke up with me in January because I didn't make her feel special anymore. Which she was definitely right about. But she could never trust me and always checked my location and my phone without ever finding anything except some benign texts to an ex about hurricane evacuation. That ended up being her primary example for why she couldn't trust me.

Skip to the summer where we've made zero contact since blocking me and she adds me back out of nowhere and "wants to be friends". Ends up trying to make me do things for her all while never giving me more than a one word response to everything and never speaking unless spoken to.

Now today I've only received a few sporadic snaps from her with the last one being 2 weeks ago. But today is her birthday and guess what she posts "I love youuuu" repost of her new boyfriend. I never knew she had a boyfriend until that day and what really gets me is that either she was trying to contact me while she was dating him which she freaked out when I did the exact same thing, or she's dating a guy who somehow loves her after dating for a week.