Re: My boyfriend never ejaculates inside
Knowing your ages and amount of sexual experience would help.
When you say "maybe he is not satisfied by me, it is making my self confidence lower."
Stop doubting yourself! You included your able to make him orgasm with oral stimulation, so effectively you have already proven you can satisfy him, so put a feather in your hat on that point.
On the why not inside aspect, our brain is the real sex organ, the penis just the device that has the button we have to push to release the pleasure hormones. Knowing nothing about his life, sexual experiences, potential abuses and/or fear of the one event that can cause pregnancy these are all hurdles he has to come to terms with.
One could even question, is he masturbating excessively or in a way that creates greater friction thus increasing his arousal threshold over vaginal friction?
Maybe simpler intimate issues like not enough foreplay is being shared to bring his arousal along (an erection alone is not a sign of sexual arousal), use of a variety of other sexual positions that increase friction and range of motion might help.
Maybe playful reversal of your sexual activity, starting with hand and oral pleasuring, then as he gets closer to his orgasmic point then try inserting his penis into you to see of his can ejaculate while inside of you!
Consider it a challenge, but do not be disappointed in not achieving your goal. Share your intimacy in the process and this should make for a more pleasurable experience for both of you!