boeing to my knowledge doesn't make fighter aircraft, they bid to make one that takes off vertically but lockheed nartin beat them with the f-22 raptor
The YF-22 (built by Lockheed-Martin) beat the Northrup-Grumman YF-23 in the Advanced Tactical Fighter competition back in 1991. The Boeing fighter you're thinking of is the XF-32, which lost the Joint-Strike Fighter competition to the Lockheed-Martin XF-35 Lightning II back in 2001.