I've been feeling doubtful about the way I look

So, I'd like to have a boyfriend, even a friend with benefits. The thing is that lately every boy that's been interested in me that I like, only tell me they are after they've been "dating" my best friend and ended up not working out. They've never gone serious with my best friend and she's more "open" to relationships. Still, most times she doesn't get closure with them, and I feel like they would go back to her if she tells them to, even if they are with me. Also I don't give that first step because I don't wanna hurt her feelings. She tells me she really likes them , but then in no time she's with someone else. I don't have feelings against her. I suppose we've all gotta give the step, as soon as we can. But I don't want to feel like the second one. I don't want to be lied to. I don't know if I've got too high standards on boys or what is it.

Edit: I've known her from before all this started to happen. Me liking someone that she also like shouldn't stop her from trying to get to know them. We should have the same opportunities, since anyone can be our match. I'm just more shy and not so straigh forward with what I want. But that's just how I am