Yes, you could be pregnant. Your boyfriend has to have the condom on before he touches you because using the pull out method, or just having half sex as you say, will not protect you against pregnancy. Take a pregnancy test. If you're not pregnant then you can see about getting on birth control or you need to use a condom every single time.
Thanks, but I still dont have those symptoms of pregnancy.
You're supposed to get your period this week, right? If you don't get it then take a test.
barbie - none of the things you listed are symptoms of early pregnancy.
When your period is due, take a home pregnancy test and you'll know.