F(34) met M(27) soon after my late boyfriend passed. I was not looking for anything, rather casual flings (which to be honest was an awful approach towards grief). It started off casual between us and exploded really fast; to the point where we saw each other daily. I’m now realizing that another relationship was not the right step for me. I keep on finding faults in this guy, who actually has been nothing but kind and curious to me. But I’m at the point where I no longer want him to come over to my place nor do I feel anymore sexual desire towards him.

I feel like an awful person, but he has already started talking about the future with me, and I’ve changed the subject many times. He is convinced that we are going to be a “forever” thing when we’ve only dated for 3.5 months.

I think he’s genuinely a great person, but I physically cannot stand him anymore. I always struggled with boundaries and now I’m struggling to ease this off

What steps can I take so that there is less hurt on his part?