Bobet,
According to your profile, you are 15. Are you sure that your boyfriend is going to be the right person to spend the rest of your life with after dating him for only a month?
You deserve to have a guy who will love you for who you are, not for what you look like or because you give him sex.
Do you know if he has ever had sex with anyone else? If so, how many others? Did you know that when you have sex with someone, you are at risk of getting the sexually transmitted diseases (STDs) of that person and their previous partners--and their partners? So if your boyfriend has had sex with 2 other girls, who have each had sex with 2 other guys, you are at risk of getting STDs from at least 7 people, probably more.
Condoms can help, if they are used consistently, but some STDs spread through skin-to-skin contact where the condom doesn't cover. Also, many STDs are viral, and once you get them, there is no cure. So no one will want to have sex with you after you get the disease, unless they have the same one.
Many guys (and some girls) don't know they have an STD until after they have passed it on. Sometimes the symptoms don't show up for a few years.
And when you have sex you make a huge emotional bond to a guy--but he often doesn't have the same attachment. For girls it is about emotional intimacy. For guys its about physical intimacy. And he can walk away from the relationship a lot easier than you can. There's no condom that will protect your heart.
The bottom line is, guys don't respect a girl who gives herself away easily. It makes sense. We value things that cost a lot, not things that are cheap. Think about a diamond necklace or a plastic Disney necklace. You would take great care of the diamond necklace, but you wouldn't care if someone borrowed the plastic one, or if it broke or you lost it.
If your boyfriend proves to be a good friend who cares about you for the next few years, and then you decide you are right for each other forever, and you make that life-long commitment of marriage, then you will both value yourselves and each other more, and you will treasure sexual intimacy, because you didn't cheapen it with other people.
Sex is a great bond in a life-long commitment, but at 15 you're not ready for that. If he loves you, he will stay your friend without sex. If he wants you to prove your love by having sex, he doesn't really love you--he just wants to use your body.