Really? How about acting mature and explaining them the truth, and expect them to be mature and handle it graciously as well?

"explaining them the truth"? ... huh? Do you mean, "How about acting mature, explaining to them the truth, and expecting them to be mature and handle it graciously as well"? Well, because - NEWSFLASH! - some people aren't exactly the most mature about these kinds of situations and could be offended if I told them, "No, actually, I don't feel like hanging out with you tonight for the same reason I haven't felt like hanging out with you the past three nights - I'm a lazy bastard and would prefer to spend the night alone on my computer." So, I fluff it up a bit for them. It's easier and avoids offending any of my friends' delicate sensibilities. I admit, it's not the most truthful thing, but what they don't know doesn't hurt them. And I don't make up retarded, unverifiable, and easily discovered lies like OP's boyfriend.

i do the same thing with friends if i just don't feel like hanging out -- i'll usually tell them that my mom said i can't hang out or that i'm busy with a doctor's appointment or something. my SO, i definitely try very hard to be truthful -- i'll say i'm tired from the previous day (which is usually work or a vacation, so it's valid). sometimes, though, if i don't think the SO will understand (sometimes they don't) i lie and say i'm busy with my parents or something. i don't lie about being with friends, though. that's just stupidity. FYL, as whatever he is doing is bad enough that he feels compelled to lie about it.

NEWSFLASH lady, English is not EVERYONE'S native language so sometimes people make mistakes!

@previous poster: exactly! And I've seen many a FML comment coming from native speakers containing way more mistakes than I'd make. And just a rhetorical question: Why bother having a SO who can't understand? I was obnoxious as a teenager, and became cranky sometimes when things didn't go my way. I'm happy people were honest with me back then, because otherwise I'd have never learned to give them space/empathize.

So said poluokkaka.

I love how you automatically assume that just because he lied, he's cheating on her. I would hate to be your SO. What if he just didn't feel like going out that day, and that was the first excuse he could come up with?

Because if you're in a relationship and sick or not feeling like seeing anyone, doesn't it make more sense to just TELL your SO that instead of coming up with a lie? Obviously he was doing something he didn't want her to know about, even if he wasn't cheating, but it's still FHL for going through all the effort.

Of course it would make more sense to tell your SO the truth, but in real life, people don't always make the most sensible choice. And yeah, it's still on FHL simply for all the effort she put into this, and the fact that her boyfriend felt the need to lie to her. But really, the party doesn't have to be ruined unless she's a crazy jealous bitch, like some of the people here in the comments section seem to be. :/

I've told my share of white lies to past girlfriends. Very rarely does it cause problems, but usually, it's not worth the trouble it can cause when it does, so I've since changed that. Perhaps OP's bf just hasn't learned that yet.

I wouldn't call that a white lie. A white lie is "yes, that dress looks good on you", or "you make absolutely splendid split pea soup"

No, she planned the party at her house. When she called her BF to get him to come over, he lied and said he was at HIS house, and also claimed to be with the friends already at the party at the OP's house. Get it?

God, I hate you so much.