NO! Dude, who gives a rat's ass if you're a virgin or not? If your friends are pressuring you, tell them to go fuck themselves. Your first time should be something special that you do with someone who you care about and who cares about you. Do you think a prostitute's gonna care about you? As someone who's used escort services in the past, I can tell you that the only thing about you that they care about is your wallet. Most of the time they don't even ask your name, and they NEVER tell you what their real name is. How special can that be? I'm not against people hiring prostitutes, I just don't think anyone should do so for their first time.
Also, why does it matter if you're still a virgin at 18? Plenty of people hold on to their virginity for much longer than that. I was 22, well, a few days shy of 22, when I lost mine. I wanted to wait for someone special. The bitch turned out to be a psycho, and then I regretted having had her as my first. My current girlfriend waited until she was 24, and she only did it because she thought I was someone very special to her. I've known people who said they would much rather have waited for someone special to do it with on their first time than with the person they lost their virginity to.
Anyway, long story short, don't get a hooker for your first time. Find out what it's like to do it on your own before you pay for it.