Just because 2 people are not comparable as friends or partners doesn't necessarily mean mistakes were made. Sure, trying to force a relationship (where there isn't one) might be a mistake, but simply not being comparable doesn't mean either party did something "wrong."

For instance, I'm dating right now looking for a partner (or friends if we click platonically). I've met some great people, but I haven't yet found anyone I'm particularly interested in. Last weekend, I went out with a woman to a festival and spent time with her and two of her friends. She was polite, funny, generous, etc-- but I didn't feel an emotional or intellectual connection. We had a few things in common (we like festivals, TV, movies, politics) but I could just tell that there was no deeper connection to be had. By the end of the day, I was very ready to go home! It turns out, she had a great time and wanted to hang out again this weekend-- but I didnt. Yes, I want more people in my life, but only people I really enjoy spending time with. I don't think I did anything wrong, and I don't think she did anything wrong. We just aren't compatible. Sure, maybe she thinks we are-- but I dont. And it takes both people to feel that way in order to actually be compatible!