I(36F) met a guy (37M) on Tinder last year and went out, but I don’t feel the spark in the connection, and he did not show any interest in pursuing further romantically. So we keep in contact as friends since we have similar interests in a few things, especially culinary. Since then, we went out to a boogie restaurant from time to time, roughly once or twice a month (always split the bill) Fast-forward, and I’m in a relationship with my now-partner (38M), with whom I fall head over heels. A few days ago, the 37M messaged me if I’m free for dinner sometime during the week, because the area we are living in has an annual food festival and I’ll head off overseas for a few weeks. I told him I could do it on Tuesday because I planned something for the other day and had a date with my partner on Thursday. He agreed, we met up, had dinner and a cocktail at dinner (I always order a cocktail if they have a creative looking menu). I brought him a homemade cookie because I have a cookie dough lying in the freezer already from the stand mixer testing last week, and he usually has a good feedback on what went well, what needs to improve, etc. My partner called me later that night. I told him I went out with a friend and brought them a failed cookie to try. But I didn’t mention it was the 37M guy. However, I have mentioned his existence a few times, and I think one of my comments (this 37M is pretty much me in a male form since he loves food and will go full-on nerd mode on food, so am I) about him might have triggered some uncomfortable feelings. Last evening, my partner asked if we could video call tonight, I said yes. We had a call, went on about our days, and he brought up the dinner. He said he pieced things together and figured out who I went to dinner with. It made him feel uncomfortable knowing I hung out with a guy with whom I had a history, and even brought him an offering. I told my partner that I treated the 37M as a friend and nothing more than that. What made my partner feel even worse was the cookie. He said I used to bring him homemade bits and pieces in our early days, but I haven’t done that lately. I countered him on this point as I started to cook a lot at his place, and I didn’t have any dough ready in the freezer for a while. He said it should be a boundary, but I’m unsure what direction he expected it to take. Does the boundary mean I can’t go out with this guy anymore or I can’t have an opposite-gender friend? I understand that my partner's feelings are valid, and I want to keep on growing with him. Also, one thing that I’d like to clarify on my part is I always brought people my baking stuff to try. Note: There was no physical intimacy between me and 37M. AITA for going out with a failed date that we remained friends and gave him the offering that happened to not specially made for him.