How can I join the Air Force as an officer, but with a 2.9 from my bachelors in psychology?

2.9 is still a good GPA Officer wise! With all the folks here on Rally Point and the Web I'm sure you can find what you're looking for! I would suggest going to the Air Force ROTC Department at the closest college you can find to your current school.

Go online to AF.mil, there' a Join the Air Force link at the top right of the page. It will take you to recruiting information. Should be able to find a recruiter from there. If you happen to be able to pass a flight physical, you might be a more attractive candidate because the Air Force has a pilot shortage.

Question is whether or not you already have the degree. If you don't, consider ROTC. If you have the degree, you may want to consider OCS/OTS. There are four published paths: AFROTC, USAFA, Enlist then become an Officer, and OTS.

There may be direct Commission opportunities if you have a specialized professional degree (JD, MD, Chaplains, etc). Your degree as you have stated it does not fit that criteria.

You may also want to consider which component you seek a commission in: Active, Reserve, or Air National Guard. There may Be further opportunities and programs to look at. The three components do separate recruiting. You may also be able to transfer between components once certain service obligations are met. Commissioning programs are all tied to needs of the service. When there is high demand in general or in specific fields, the gates widen. When times are tight, the gates narrow.

An option: go for a second bachelor's or a master's degree at a school that has AFROTC. If this is something you may want to do, go sit down with an AFROTC recruiter at the school (not the AF recruiter down town) and see if that is possible. This is a very macro statement, most ROTC programs can get you in and out in 2-3 years, current programs may vary (that needs of the service thing again).

Suppose my question back to you is why specifically the Air Force? Is there a particular USAF career field that is calling you? There are four other branches out there., even if being a pilot is your primary goal. Particularly if flying is your goal, you might look at being an Army Warrant Officer Aviator.

https://www.airforce.com/how-to-join/process/officer