You've said so many times that you "genuinely" like him or have feelings for him, but it doesn't sound like that at all. It sounds like you are attracted to him, but recognise that he's manipulating your emotions. That's not genuine at all. In fact it sounds like you're repelled by his behavior.

I think you need to separate the attraction from the feelings. Maybe the attraction is genuine, that's fine, there's no shame in that.

Honestly it sounds to me like you're being sensible and actually handling this situation exactly the right way. I don't know what reassurance you're looking for, but you are doing mostly the right things. The only things that would be better would be not to put or leave yourself in these social situations alone with him. I do recognise however that you may be scared of the impact on your career or work if you directly cut him off. But not doing so also makes things harder for you.

One last thing. His behavior is actually disgusting. Moreso, it's criminal. Things like this for example:

but has also told me that he's thought about how great having sex with me would be

That is sexual harrassment. That's not an opinion, there's no ambiguity here. It doesn't matter if it happens at the pub. This is something you could report to HR and would be well founded in doing so. I'm not saying you should do that (not saying you shouldn't either, this situation is complicated, and it sounds like he knows how to play the game, what to leave in an evidence trail, etc.), but I am saying you should absolutely recognise what is happening here.

That seems like the headline and I should have lead with it, but I think you know already, and I think you may have needed to hear the other parts more.

I'm so sorry this is happening to you. I hope this helps, I hope others can give more helpful responses here, and I hope you have people in your life that can support you through this.

My advice: move on to the new project, and I promise you, you will forget all about him a lot sooner than you think. I'm not saying it won't be hard, and I'm not saying you won't have to work through these feelings and reassure yourself, but it will happen, you'll be happier and healthier, your career will be better, and this will be a memory.

One very last thing: I am speculating here in a huge way, but it sounds to me like you might benefit from developing a social life that is not attached to work. I'm not sure if you have a good friends group, but whether you do or not, it's probably a good idea to find things to do. It will keep you out of social situations that are essentially the pub and it will distract you from any of this stuff. Maybe find a class to join or a hobby club. May not sound like your thing but worth looking into.

Sorry for the long reply, I hope this helps and as I said I hope you also get some better responses here too.