[Poseidon]

I really need advice on what could be a crucial decision.

I've suspected for some time now that my girlfriend has been cheating on me. The usual signs...phone rings, but if I answer, the caller hangs up. My gf has been going out with the girls a lot recently, although when I ask their
names she always says, "Just some friends from work, you don't know them."

I sometimes stay awake to look out for her taxi coming home, but she always comes walking up the drive as I hear the sound of a car leaving, around the corner, as if she has gotten out and walked the rest of the way. Why? Maybe she wasn't in a taxi at all?

I once picked up her mobile phone, just to see what time it was. This caused
her to go completely berserk. She quickly grabbed the phone out of my hand and cursed me hysterically, screaming that I should never touch her personal property, then accused me of trying to spy on her.

Anyway, I have never broached the subject with my gf. I think deep down I just didn't want to know the truth, but last night she went out again and I decided to really check on her. I decided I was going to park my car next to the garage and then hide behind it so I could get a good view of the street around the corner when she came home. It was at that moment, crouching behind my car that I noticed a small amount of motor oil leaking from underneath.

So... is this worth repairing myself, or finish where i am and get something else?