I’m confused if I’m Bi

So I always thought I was straight no questions asked. In general I’m a big tomboy so most people always assume that I’m gay or at least bisexual. I honestly don’t mind getting such comments they just confuse me a lot. I’m not a very affectionate person, quite closed off and reserved so I don’t have that many crushes maybe like 3 guys in my lifetime and 2 relationships/ physical intimacy with 2 guys. I’m 18. I never felt like I liked a woman I would never say she is hot but I wouldn’t say that for a guy either. Recently I met this girl who is bi and we got super close In a very short amount of time. She is super affectionate touching me and laying on me and stuff and I really enjoy doing that it feels so nice to be held and stuff but I don’t think I want to do anything more. But I’m very confused about it. Is it normal to do this with a friend?