Having a single sexual partner is being sexually active.
No it is not right to tell your girlfriend you are sexually attracted to her friends. If in doubt put yourself in her shoes as to how you would feel if she was sexually attracted to all of your male friends. There is nothing wrong with admiring good looking young women, but for you to be acting like a Tom cat peering at all her friends and sexually thinking about them then you need to grow up and concentrate on your girlfriend more or, if you prefer to date several young women then do your girlfriend a favor and break up with her.
They have sex more... Obviously.
Generally speaking, yes
You can usually tell when a women is sexually active because of their behaviour. they seem happier but more secretive and not normal.
As with everything practice Becoming more sexually active can help you naturally build stamina in bed, also masturbation can allow you to have an increase in sex drive
Be more manly, be more protective of her, don't back down in an argument, be more sexually active towards her.
I was sexually active as a teenager, within my culture there's no shame put on being sexually active as a teenager as long as you are legally old enough and you're mature enough to deal with the consequences. The only way I feel about it is that I regret I didn't know more about sex to understand that not reaching climax during penetrative vaginal sex alone was normal.
get a boob job
There is no evidence that the colour of your eyes has anything to do with sexual activity.
because teens are generally more sexually active than older people
i suck penis every time , and shout more, and push him to do more positions. Take command once and a while.