I wouldn't be concerned for hiv.
Hsv1 is far more often transmitted from oral sex than Intercourse as the virus is more active and likes the oral cavity better than the genitals. I am betting my bottom dollar your partner has a long standing oral infection and the test isn't picking up antibodies. It's not uncommon at all for this to be the case. It's one of the confusing things about hsv testing and results. You can never 100% sure that the igg hsv1 test will pick up on an infection. The western blot test from the University of Washington is better at picking up hsv1.
In your case it doesn't make any difference as you both clearly have it. Most adults do. It's no big deal and changes nothing for you two.
I also want to thank and applaud your attitude towards this. You have the right attitude and it is a pleasure to help folks like you.
Yes. Neither have us have been with anyone else in over 3 years, so that's why I'm not necessarily having the freak out of how I got vs just confused. We have had sex hundreds of times sometimes without protection and I've never gotten symptoms until recently
The swab tests are very accurate and it is truly unlikely to have a false positive.
Your hsv blood test most likely didn't have a positive results as it's a new infection and your body has not built antibodies yet. The hsv igg blood test looks for these antibodies and not the actual virus. Your swab found the actual virus.
As for your partner. Hsv1 igg blood tests miss at the very minimum 1 out of ten infections. So your partner may have a long standing oral hsv1 infection and not even know it. Most people get hsv1 (cold sores) when they are small children as the immune system is weak. They have a outbreak or two then the virus lays dormant. It will she'd from time to time even though no symptoms are present. You most assuredly got hsv1 on your genitals from oral sex.
Now, hsv1 on the genitals is far better than hsv2. Hsv1 has few outbreaks and some folks never get more than a few in a lifetime. It also sheds far less. I know your partner tested negative but if this is the only person you have been with, including oral sex. Then it would make sense you received it from oral sex with your partner.