A proper seduction cannot take place if you're in a crowded area. To be intimate, you need an intimate space. This could be at the end of a night at a party together, or after one of you has invited the other over. A quiet, private setting is important because you don't want any external pressures affecting the way the seduction is received. Even if someone wants to be seduced, they may feel shy about it if they think their friends will be there to see it happen. Even if your friend finds you physically attractive, you will have a hard time of properly seducing them if you're bringing their mood down. Emphasize your positive side. This can be done as simply as making a conscious decision to be pleasant around the person you would like to seduce. Being cheerful leads to opportunities to flirt more openly, whether you consciously mean to or not. A proper seduction is very rarely a serious thing. Touch is an important part of flirting. It's the way that's going to break the two of you past the barrier between friends and something more. Light touching can include anything from a hug to a brief touch on the arm. These movements aren't risking a lot, and you can usually tell from the way they're reacting to it whether they'll accept bolder gestures. You can try to keep your flirtations subtle if you want to save the chance of pulling back if you decide your affections aren't being reciprocated. While it's normal to make eye contact with a friend while you're talking, prolonged eye contact usually hints at something more. Studies have shown that holding someone's gaze for an extended amount of time can provoke intense feelings. Even if you normally spend time with this friend, make a point of keeping eye contact while you seduce them. The reaction of eye contact can be positive or negative. A lot of it depends on whether the other person finds you physically attractive. If the friend you want to seduce is already close and comfortable enough with you, regular conversation should come naturally to the two of you. With the foundations in place, you'll want to work playful flirting into your talk. Exchanging light, teasing remarks into your conversation is a great place to start. Compliments are a more direct way of showing interest, especially if those compliments are aimed at things you're typically attracted to. An example of a flirtatious remark: "Your hair looks great today. I think it really suits you." A simple but important thing to do before you make the final push is to reflect on the ways in which your friend has reacted towards your flirtations thus far. If they've smiled when you've touched them or responded to your teasing with teasing of their own, it's probable your friend is inviting you to make a move. On the contrary, if your friend is looking uncomfortable, it's probably a sign you should back off. Everyone's psychology is different. If you are already friends with this person, you should have at least a basic idea how you think they'd react to someone they're attracted to. All seductions involve a moment of truth. Most often, this means a kiss, although it might also mean an overtly sexual or romantic comment. If your friend has responded well to non-committal overtures, you can move in. Kissing on the lips is often seen as something that is reserved for more than just friends. Once you think the time is right, move in. Don't be too quick about it either. It may be stressful, but it's not an experience you want to rush. All bold moves are risky by their very nature. It's a good idea to feel out your chances before making a commitment to the seduction. A strange thing about seduction is that it sometimes becomes hard to know who is seducing who. Women generally tend to play a more submissive role in seductions, but women sometimes play it off as an active way to pull a man in. If you think there is mutual attraction there, they may well be waiting for the right moment to make their own move. You should let them know that it's a good idea to step in.

Summary:
Find a quiet moment together. Make the interaction light and playful. Express attraction through light touching. Hold your friend's gaze. Work flirtation into your conversation. Gauge your friend's current reaction. Make a bold move. Open yourself to the possibility of being seduced.