Is it a normal for me to want exclusivity before sex?

I (20M) for some context am a 40 time sexual assault survivor. Because if this I tend to want to trust someone before I engage in sex. The main reason I want to wait, however, is because I get extremely attached to people I have sex with. Me and a girl got high the other day and hooked up. This was a month ago and I’m still struggling to get over her. I can’t do that again. I’m just afraid that I won’t find someone that is ok with this. I’m an ok looking guy. I’m tall. I have blond hair. I could lose 20 pounds but I’m not fat. I pay for everything when I date someone. I’m a computer scientist and an investor. But I’m still afraid I won’t find someone. Oh and I see a psychiatrist so I don’t need that recommendation. Thanks guys and gals!