Masturbating to thought of ex?

Soooo my boyfriend very recently broke up with me... and I’m someone who needs to think about someone when I masturbate to get off. Before we dated when I first liked him, I got off to the thought of him. That was several months of thinking of only him and then once we were together of course he was absolutely the only one in my mind. And no other guy has ever even popped into my head. So that’s a very long time of him being the only one I think of.. I want to be able to get off now that we are broken up but I’m very much in love with him still and he’s the only one I want to masturbate to the thought of. But I feel like that’s not healthy to always be thinking of my ex if I want to move on. It makes me feel sad and gross. But any time I’ve tried to think of another man I find attractive I immediately get turned off and don’t find anything pleasurable anymore.

How can I get past this? I’m okay with not helping myself for a little while to get past it but eventually a girl has needs 😪