How do I choose? I like all three of them.?

Preface, I'm bisexual, leaning more towards girls, and I've been dating a guy, let's call him A, and then two girls, let's say S and I, have said they like me. A and I have been drifting apart and I haven't seen him for months. He and I have basically agreed that if we can't see each other in a few weeks, it'll be over. So, he's definitely not going to be able to see me for a long time. So, I also somewhat like the two other girls, I and S. I probably won't be able to date me because she's going through a lot right now and dating S would cause friendship issues, but I really do like her a lot. I also am open to the idea of just being single. I just want stranger's opinions! XD