It takes 3 - 4 months to show up positive on a blood test. Therefore, the herpes infection that he had is at least that old. However, it's entirely possible that he didn't know he had it, as many people don't show symptoms. But the friction of oral sex may have initiated an outbreak for him, and this can happen right away. Do not let him blame you for a positive blood test.
Oral sex CAN transmit the virus tho', and in this case I think the reverse arguement is true. It would appear that YOU have been the one who has been exposed. You may now have oral herpes, transmitted via oral sex. Generally, a person who has been exposed to the virus will show symptoms within 3 - 10 days. Sometimes a bit longer. That's if they show symptoms at all - again, many people don't. Symptoms for oral herpes would include cold sores, and symptoms of first exposure include flu-like signs (fever, aches, pains etc.)
My suggestion to you would be this. Wait a week or two and see if you have any reaction. It would appear that, if he felt tingly, he may have been on the verge of an outbreak, which would increase the risk of transmission. But please don't panic, it's by no means guaranteed that you've acquired the virus. If you react - meaning develop cold sores or get sick, go to your doctor immediatly and have them cultured. Ask them to do a type specific test, ask for HerpesSelect. I would also have them do a blood test. If your culture comes back positive, and the blood comes back negative, you know that you've only acquired the virus recently.
If the bloodwork comes back positive, then you've had herpes for awhile. If the culture on the cold sores comes back positive for a different strain than a positive blood test, then you know that he's given you a new strain.
If you show no symptoms, get a bloodtest done now anyway. If it's negative, that means you have no prior infection. Then go back in 3 months and get tested again. If it's positive, then you'll know that you got the virus within that time period, probably from this guy.
I realize all this is confusing - read it a couple times and it will start to make sense!!

It's important to followup and find out for sure. But at the same time, try not to panic too much - the chances of actually getting the virus are only about 9% if he's not having an outbreak. So there's a good chance you will be fine.
Good luck, and keep us "posted"