<human>: I met Frank a month ago and we clicked immediately. The first date we had, we talked all night and then kissed in his car. I had butterflies for a week. After our third date, he said that he really liked me and he was on board for whatever I was ready for, whether I wanted to take it slow or get exclusive. I told him that I wanted to take it slow, and he was fine with that. I'm not seeing anyone else at the moment, but I didn't want to get serious again so soon.

But sometimes when Frank cuddles me or strokes my hair, I get this involuntary memory of my ex doing the same thing. My ex and I broke up a few months ago because he was kind of emotionally cheating on me, and we went NC after months of crying and fighting, so I thought I was fine--I had stopped crying about it and we were really incompatible anyway, so I started going out and dating and I met Frank that way.

But it makes me sad and anxious when these memories pop up, even though they were good memories. Like, even though our relationship was shitty overall, I still kind of miss the good times. It makes me withdraw a bit from Frank too. He's really respectful of my boundaries and space, so he takes this all in stride, but I feel terrible about it all, and incredibly guilty.

I REALLY don't want to break up with Frank. I like him a lot, and I see a future with him--he's SO handsome and smart and kind and generous and trustworthy; we have amazing intellectual, emotional, and physical chemistry together; and he is so freaking good to me!! I just feel so stupid about my timing. If I'd met him just a few months later, things would be perfect, and I feel like I screwed up by trying to date so soon after my breakup because I can't stop remembering the good times about my ex, even though our relationship was so shitty.

This never happened with my previous exes and I don't know why it's happening now. What do I do?

Can you condense the text into three sentences or less?
<bot>: Seeing a new guy but I get involuntary memories of good times with my ex, even though our relationship was shitty. I REALLY like this new guy and I hate thinking about my ex so much. What do I do??