Be really nice, smile, be helpful, compliment, flirt...etc
There isn't really an age that it's best to have a boyfriend just make sure you are mature and emotionally ready to have a boyfriend and that your comfortable with any situation that might come your way.
You could have one but it really is way too young to be worried about having a boyfriend. Its best to wait until your older. answer NO!
Say that you want to be with him because you love him
I'm also assuming that your best friend is somebody that you've known for a very long time. He or she is entitled to his or her own opinion. You have your reasons for liking your boyfriend and they have theirs for hating him. If your friendship with your best friend is damaged by your relationship with your boyfriend, I'm sorry to say that you'd have to reconsider labeling that friend as your "best" friend. A best friend is somebody who will be there for you through thick and thin. A best friend will still be by your side even if the person on the other side is somebody they despise. You cannot force your friend to like your boyfriend. Hate to break it to you, but high school relationships are a joke. Unless you are going to go to the same college (bad idea), it's not really going to work out in the end. You can claim to "be in love" now, but you really have no idea what that even means. If you let your [high school] boyfriend get in the way of your relationship with your "best" friend, you really have to reconsider what it means to be a "best" friend. Your relationship with your boyfriend should in no way shape or form get in the way between you and your "best" friend.
As he is your ex-boyfriend, then it may not be any problem. But ensure that your relationship with him doesn't affect their friendship. This way, it would be easier for all three of you.
do something very nice with her or even do something really special for her maybe even have your boyfriend tell you what she likes and stuff so you can plan a head of time
If you mean in a non sexual way, then my boyfriend, the thing her likes best is to make me happy and to see me smile, to show me he cares. If you mean in a sexual way, each guy to his own really.
Well think of it this way: Who is more important to you? Your best friend or your boyfriend's friends?
the best way to tell him is just to say it to him in person say it in all honesty and everything will go just fine!
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The best way to reduce sweat in a fast way is to take a shower.
Tell him that you cant stand him and that he is worthless and you hate his gutts. That is a really easy way and the hard way im not gonna say. :)