Can you give me advice?

So my ex-boyfriend has a girlfriend who I think he isn’t into. She’s definitely not his type and they’ve been best friends for years…They started dating in November of 2021; she’s been posting pictures of him since day one. He started posting pictures of her on February 30th, 2022. His close friend told me in January that he’s with her just because. Every time I pass him he always looks at me. He tried to get with me in September 2021 and I rejected him. I was talking to his basketball coach and he purposely stood beside me to hear our conversation. When I was dating him he was a stalker and a total narcissist. They don’t even hold hands in public he walks in front of her. The dates are what his friends have been giving me I promise I’m not stalker 😂
Can you give me advice?
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