Best Friend Uses Me As An Alibi?

[Anonymous]

In 2015, I got a message from my friend telling me if her husband asked, she was with me a certain night. I didn't respond or think much of it. Later I found out, after 12-13 years of marriage, she had cheated on him and used me as an alibi.
Her marriage ended, both of them started seeing other people. While she was with her current boyfriend and her ex had broken up with his girl, the two of them slept together twice and my friend didn't tell her boyfriend. She has been hanging out with a guy she met/slept with before she met her current boyfriend and although I'm sure nothing is going on between them (it's not my business anyway) she won't tell her boyfriend she's hanging out with this guy.
Today, she told me she's going to the movies with this other guy and she told her boyfriend she was going to be with me. I'm not okay with it at all, as the last time she did this she cheated on her husband. I don't want people thinking I'm covering for her when she does wrong. My issue is I absolutely can't handle confrontation. I'm dealing with some severe depression issues right now and won't be able to handle fighting with someone who means so much to me (despite the wrong she does, she is a great friend to me). I didn't respond to her text but I'm very bothered by her using me as an alibi so I don't know what to do.

[thiswasamistake]

If she's not a good, close friend, I would tell the boyfriend only if he asks. You shouldn't go out of your way to tell him. It's better if he naturally finds out on his own that she was lying or whatever. If you try to tell him yourself, it's possible he could take it a different/wrong way and it's none of your business to interfere in other couples' relationships anyway.

[Asker]

She's my best friend and I have no intention of getting involved I'm just bothered that she feels she can throw my name out there when she's doing something she knows will upset him. I have no involvement in any of her relationships and I want to keep it that way I just don't know how to tell her that without causing a fight

[thiswasamistake]

In that case, I would talk to her directly about being used as an alibi. I might start by asking why she wants you to cover for her when she's out with the other guy. Try wording it neutrally (don't spend too long on this either). Eventually you want to mention that being used as an alibi makes you feel uncomfortable and puts you in an awkward situation if the boyfriend ever asks you about it. If she's insistent on using you as an alibi even after this, I don't think she thinks of you the same way you think of her and you may want to think about other friends.