Ashley: This may be a time to count your blessings! I'll bet a lot of women would change problems with you in a minute:p
Seriously, there is no problem with starting with oral sex and moving to intercourse. I've dated girls who thought they had somehow failed if I didn't climax with just oral. Nothing can be further from the truth. Some of the most incredible orgasms I have had have happened after sex started with oral and wound up in intercourse.
FYI, some of the biology here is that thrusting is a signal to a man to climax. When he is passively receiving pleasure, his brain may not send the signal to have an orgasm. that doesn't mean it isn't great. There is nothing that makes a man feel more accepted, loved, and appreciated than oral sex. you can enjoy each other in a lot of ways, but moving to intercourse to finish is totally fine. It doesn't mean you're doing anything wrong. He's a lucky guy, to have a woman who is this concerned about his feelings and needs.
FYI, oral sex is the greatest stress reliever ever discovered. You're probably doing more for him than you realize.