is my car battery dead?
so long story short, me and my girl were sitting in my car having a pretty intense make out session. I had the engine turned off but had it turned so the radio was on, and I also had my headlights on (I know it's stupid to do so). the radio turned off, so I turned the lights and car off to see what's up. it wouldn't start for a few tries. I let it sit for like 5 minutes and tried again and it started. everything seems to be okay, I drove home and it was all good. my question is is anything going to happen? is my battery about dead? will letting the car sit for a day let it repair itself? any help would be appreciated.
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Letting it sit is the worst thing you can do. Drive it 25 miles and recharge the battery (I know I'll get slammed for saying that) or put the battery on a charger.
Remember it's getting cold out. Cold weather is the time of year when you're using the headlights, heater and wipers more frequently. Not to mention cold weather will kill an already weak battery.
After you've driven it, pull the battery take it to (most) any local parts store and have them test it, they will charge it at the same time for free. Most are honest and are not going to tell you a new battery is needed unless it needs to be replaced. Most have a very expensive tester/charger sitting in the store and you will need to leave the battery there for at least an hour or two.
Spuds is right. Don't let it sit. You need to drive it to put the battery through its cycles. The fact that after sitting a few minutes and then still started, tells me the battery is still good. The other day I went out to my truck and realized I left the seat heater on overnight... completely dead, battery read 7 volts and nothing worked. Jumped it, let it run for about an hour and its good now. You're in better shape than I was, so you should be fine.
Your battery is now pregnant, time to dump it.