I’d like to think that the second choice isn’t an option, since I’m assuming you don’t want to lose either of your friends. If they are really your best friends, they’ll hear you out and do what they can to keep your friendship intact.
You don’t need to be mean – just be honest and clear with them.
If you're interested in someone who notices your profile or you're intrigued by a computer-generated match, let the e-mail begin. You don't want to learn only one person's interests, ways, or habits.
If you're not interested, delete the e-mail with about the same level of remorse you'd feel from dumping jellyfish overboard. You don't want to discover how you react to just one person. Pizza's great, but if you never tried anything else, you'd never know how supper hamburgers and hot dogs and tacos and chop suey are.
Sometimes, new couples don’t realize how alienating they’re being. Talking to them should hopefully clear some things up, but – and this is a bummer – you should know that some things .
I know that stinks to hear, but it doesn’t mean that you can’t continue being best friends with them.