I've been with my new boyfriend for over a month now, and he has a best friend who I used to get along perfectly well with - until we started going out.

I met my boyfriend way back in September, and almost straight away I started to like him. But then I noticed him spending a LOT of time with this other girl, so I presumed they were going out and decided, with his best interests at heart, I wouldn't come between them. I also got to know that girl too and we ended up getting along fine, which made everything feel better.

Deep down of course I still really liked him, and the more I got to know him the more I got to like him. But because I wanted him to be happy, I didn't drop hints or make any moves and simply enjoyed being with him whenever he was around. Then the college ball came - and I was taken completely by surprise when he sat with his arms around me for a whole hour of the night, and we had our first kiss - in plain view of his best friend. Then it all became clear, as he explained that they had been best friends and had basically depended on each other for the last year, as they had both been sharing deep personal problems.

So things were going well and we started having lots of fun together and making each other very happy, but his best friend did not approve and gave him a hard time over spending less time with her. He didn't stop hanging out with her, just obviously didn't have the same amount of time for her as before. About two weeks later she stopped being so hard on him about it - but now it's me she's got a problem with. She ignores me, blanking me when I try to speak to her and leaving the room as soon as I enter. I am worried that she is trying to cause friction between me and him because of jealousy. What's more, she appears to be telling him a different story as I've tried but failed to convince him she is behaving oddly around me and really doesn't like me anymore. Most of all, I am surprised and disappointed at her behaviour, because I am seeing a whole new scary side to her that I never would have expected before.

My biggest worry is that she is going to manipulate my boyfriend into thinking I am the wrong person for him by starting a fight or something between us, and I don't know how to explain this to him when she's still his best friend.

Any advice? Please?

This is rather a difficult one to reply to. How can he be your boyfriend if he is with this other girl? I'm confused. Would you like to explain this a bit clearer and I might be able to help?

Distance yourself from her, as a friend, and just deal with the fellow. Its his friend, let HIM deal with her.

Don't worry about what she says behind your back, as you have no control over her jealous, conniving a$$, any way.