First of all, my condolences............
You are jump starting the bike with another battery. If so, have the other vehicle off so the alternator will not be influencing your bike. Turn the key on to make sure charge light is on. Then start the bike to see if the light goes out. Then connect a DVOM to the battery and use the fast idle to run it about 1500 rpm. It should show at least 14v charge rate.
If all this is good and the bike will run with this battery connected, you just need to get a battery and Battery Tender for winter charging.