AITA for wearing the "joke" bikini my friend got me?

I (28F) went to the beach this weekend with my friend "Kate" (28F). <br><br>Kate and I have been friends since middle school. We don't hang out often anymore since we live in different cities, but we keep in touch. I was always slightly self-conscious as a kid because Kate is one of those people who is genetically lost weight and in shape no matter what she does. I am not that way at all, I need to exercise and eat right in order lose weight and get in shape. <br><br>That being said, I take care of myself and try to eat well with the exception of the occasional pizza or fast food. I will admit that I am pretty insecure about the way that I look. In college, I started to lose weight and get in a little better shape. Kate said "Oh good! Now we can be skinny bitches together" when I was pretty much at my lowest point. It stuck with me. <br><br>I am a little thicker than I was in college, but not super overweight- I wear a US size 10. I still make an effort to stay in shape and get some kind of exercise a couple times a week. I was pretty nervous about wearing a bikini in front of Kate because of my stupid insecurity issues.<br><br>Kate and I decided to meet at the beach in our city. I had just moved back to our home town after college, but Kate never left. I brought a red bikini that I recently got with me. Kate immediately asked me what my plans were and if I was going to wear that in front of people. I was like "Yeah... I was planning on it." Kate put her hand on my back and said "Okay, well I'm going to run to target real quick and I'll be back." She left and then came back with a stupid Walmart bags. Inside the bag was a neon pink thong bikini. I said "What the fuck is this?" And she was like "I got this for you silly! It's a little something I saw when I was at Target. It looks like something you'd like." <br><br>This is a lie. I would never wear anything like that. Kate and I have been friends for TOO fucking long for her to not know that. I was taken aback and said "Kate... Thanks.... But I think we're a little too old for joke gifts. I'm not gonna wear this." Kate was like "Come on! It's just a joke! I did it for laughs! Don't be such a bummer." I was like "Okay, fine. Whatever." And then I put my real bikini on and we left. I brought the joke bikini with me just in case my other one got wet. I didn't want to have to wait for it to dry in the car. <br><br>So we're at the beach and we're hanging out for a while. Kate kept calling me a prude and making jokes about how I wouldn't wear the "spicy" bikini. It was really getting on my nerves. Eventually, I'm like "You know what, Kate? Yeah, I'm gonna wear that bikini." I go into the bathroom and I change my clothes. I come out to Kate and she immediately looks at me and says "Oh my gosh, what are you doing? That is not flattering on you at all, you need to change." I was like "Ha! Gotcha, Kate! I knew you didn't really want me to wear it! Bullshit, you got me a bikini that you knew I wouldn't wear because you wanted to embarrass me!"<br><br>Kate was like "Uh, no. I was just concerned about you because you look gross." I asked her what she meant by that. Kate said "I mean, it highlights your gut and your thighs. It emphasizes your imperfections. I'm just worried that you'll get fat shamed. Why would you think I was trying to embarrass you? I just thought it was a funny little present from one friend to another!"<br><br>I got pissed off and I was like "You fucking know what I thought? I thought you got me that stupid fucking "bikini" because I am not as skinny as you and you wanted to embarrass me. You've been making backhanded comments about my weight since college. I think you love the fact that I gained a few pounds since then because it makes you feel better about yourself. I am not gross, Kate. I'm not fat. But you are fucking mean and I don't know if I wanna be friends with someone as mean as you."<br><br>Kate was like "I didn't mean to hurt your feelings. Let's talk about this." And I was like "There's nothing to talk about, I am leaving and going home." And then I got in my car and left. Now Kate won't leave me the fuck alone and is calling me, texting me, and emailing me. Every message she sends is like "OMG! You're being such a bitch! Let's talk!" <br><br>AITA?