Am I ready to have sex?

Only you know if you are ready. If you feel ready, you are probably ready.

One thing I would say, though - and I'm sure others will point it out too - there aren't many countries in the world where it's legal for him to have sex with you.

nope.

Stop and think!
You're too young and not even married. It has big effects to both of you.
What about those who are? Researchers have found that many of such youths experience one or more of the following rude awakenings.

Distress. Most youths who have engaged in premarital sex say that they regretted it afterward.

Distrust. After having sex, each partner begins to wonder, ‘Who else has he/she had sex with?’

Disillusionment. Deep down, many girls would prefer someone who will protect them, not use them. And many boys find that they are less attracted to a girl who has given in to their advances.

The bottom line: Your body is far too valuable to give away. Show that you have strength of character by obeying God’s laws against premarital sex. Then, if you do marry one day, you can have sex. And you’ll be able to enjoy it fully—without the worries, regrets, and insecurities that are so often the aftermath of premarital sex.—Proverbs 7:22, 23; 1 Corinthians 7:3.

well you have to go with what your heart tells you to mabe you should wait and give it some long deep thought before you follow through it takes a whole new way to just decide to sleep with someone dear to your heart I suggest if you do use a condom or get on some birth control you need protection