Every guy who has a best male friend knows there are certain rules you don't break. Like getting in the front seat after your pal called shotgun. But for the more serious situations, the rules are not always as clear cut. If you find yourself digging your best friend's ex, there are some steps you should take before you kiss that friendship goodbye.

The best thing you can do is be honest with him. If you genuinely have feelings for her and she feels the same way for you-break the news to him first before anyone else finds out. If you manage to keep it under wraps, you can delay the consequences, which will give you time to see if it is just a hook up or something more. But, if he finds out what you've been doing behind his back before you get a chance to tell him, expect to receive a beat down, endure a strained friendship or lose your best friend.

Once you decide to break it to him, have a sit down. Having a one-on-one with him will show that you are honest and value your friendship. While he might be hurt at first, he will appreciate how you handled the situation. If he gives you the go-ahead, then go for it. But, be aware that there still might be some awkward moments when you are all in the same room. If he tells you to stay away from her, then you have to decide which relationship is more important.

If you get the go-ahead, try not to flaunt your relationship infront of him. If you two are made for each other, than he will realize that over time and feelings will calm down. Worst case scenario, you two don't work out, but you will still have your best friend.