Pilot reported they took evasive action to avoid a light twin using the opposite direction runway at a non-towered airport.

Narrative

Two planes experienced a near-miss due to simultaneous takeoffs from opposite ends of the runway. I started my Aircraft X and allowed it to run a few moments since the temperature was approximately 70F and the low that morning was 50F. I received weather from the CTAF (Wind 260 @ 03; Visibility 10; Sky conditions CLEAR). Wind was favoring Runway 25. Previous traffic that morning had been using Runway 25 and a jet was 15 minutes out inbound for Runway 25. I made a radio call to report that I was taxiing to Runway 25. Other comm traffic on our frequency was from other airports. Upon completing my runup; the inbound jet reported he was 5 minutes out and would be entering the left downwind for Runway 25. I checked the pattern and Runway 07 final for any traffic. Our airport has a hump that prevents visual confirmation of aircraft at the opposite end of the runway. I made a radio call that I was departing Runway 25 and would depart the area to the north. I rolled on to Runway 25 and began my takeoff roll. I verified Airspeed ALIVE and Engine gauges GREEN. As airspeed reached 60mph; I began to rotate. As I became airborne; I pitched forward slightly to raise my airspeed. At that point I saw Aircraft Y coming toward me on the runway. We were both approaching midfield. He was not airborne; so I could not tell if he was taking off or had just landed. To avoid colliding with him; I pitched up and slightly to the right until I heard my stall horn begin to sound. He maintained center of the runway and passed under my left wing with a separation of approximately 50 feet. I continued my takeoff by straightening my heading on the upwind side of Runway 25 and nosed forward to regain airspeed. I radioed to the inbound jet that another plane was on the runway; and I could not tell if he was landing or departing Runway 07. The jet reported he was on downwind for Runway 25 and observed the near-miss. He reported Aircraft Y was departing and he would conduct a right-270 into the Left Base Runway 25 to allow the traffic to depart. I reported that I never heard Aircraft Y's radio call. The jet said he also did not hear a radio call from Aircraft Y; at which time the Aircraft Y pilot reported that he did make a radio call. I flew around north of the field for about 45 minutes to allow my nerves to calm and then returned to the airport for a full stop landing. Upon landing; a different jet crew who was on the ground during the near-miss came up to me and said that I did a good job avoiding and that they also never heard a radio call from Aircraft Y.