Breakup

So i recently seen someone at school that tried to get with me before but i never thought they were cute intill now. He seems like a gentleman. But to make it messier i have a boyfriend. To me i am not happy n my relationship i tried to break it off mutiple times But.. he keeps trying to convince me that we should work it out.

Tbh im not even attracted to my boyfriend anymore. But i still love and care about him. Also he said if we break up we wont ever talk again.

We have been together for 3 years

And to make it worst he claims that he is depressed ans im not there for him so i can stay i don’t believe it because im always hearing him laugh and talk and he isnt isolating himself. HELPP