This question is kind of tricky, but I'll try to help.

Yummy!

Let me start off by saying that I ADORE the best friend into love thing. My first real love was a boy who had been my best friend for years and I feel like I know exactly how you feel. Yummy!

Guys Love This Kind of Setup

But every rose has it's thorns. And these may be particularly painful because you are already so emotionally close. I'm sure, in your mind you think that the natural progression is that your friend forgets all about what's-her-name and settles into bliss with you.

But that didn't happen, did it? He still wants to see her, and if you let him, have sex with you too!

Men (God bless their commitment-phobic souls!) love a set-up like this.

And I'm sure you wish you could give it to him. Unfortunately, you can't, because you want him for yourself, and your heart is involved.

Don't Let Him Sleep with Both of You

If he approaches you again sexually (and he will, believe me), tell him that he means too much to you for you to sleep with him casually. I know this will be hard, girl, but try to keep your eye on the big picture. You can't allow him to hurt you by sleeping with you both at the same time. It will ruin everything, you will lose your friendship and your lover.

Flirt with Others

Since he wants to act like what happened between you means nothing, play along! Let him see you flirt with someone else or even talk to him about another man. After all, you guys are just friends, right? You should be able to discuss the sexy, smart, OLDER man that you met at the beach, right? If there is no one that you can think of, make something up. I know that honesty is usually the best policy, but all is fair...

You need to give him the opportunity to feel his need to go after you. After all, you have made it pretty easy for him so far. He needs to work for you a little. And you need to know how he feels, better sooner than later. If he really doesn't seem jealous, you know how he feels, and you can start repairing your friendship.

Panic Over Intimacy

Another problem is that because you are so close, he feel panic because of the intimacy you two have. He sounds like he definitely needs time to realize what you already know – that you would be perfect together!

When he sees that you aren't trying to railroad him into a relationship, he might come around on his own.

I wish someone had told me the same thing when I was in this situation.

Good Luck! I hope this works out for you!

– Patra