If you like her and see likes you, take her out on a date and see how it goes.
If you don't try you will always be in doubt.
''How would it be if I took her out on a date'?''
Her friends aren't your problem, you don't need to hang out with them, but you shouldn't worry about that now.
Don't feel pressured by your friends, it's your life man.
If they are real friends, they'd be happy for you.
Otherwise, they are probably just jealous.
Follow your heart.