I am 19 and I have been active with my boyfriend. I justwant to know if I suck his penis, can I get an STD or anykind of disease?

Yes, . Yes, if he has a sexually transmitted disease. A number of sexually transmitted diseases can be transmitted with oral to genital contact. This is one reason that it is really important to know the person that you are with.
Without . Without any barrier between you and your partner you expose your self to sexually transmitted disease.
I . I agree. It is important to practice safe sex in order to protect yourself from a possible std.