I can't cook for s*** but spaghetti is so damn easy even I can do it. Some real chef here might laugh at this advice but take it from a bachelor who can't cook that this is what needs to happen:
Noodles: Boil some water in a pot on the stove. Throw a box of pasta in there. Add a pinch of salt. I don't know why but my mom told me to do it. The box of noodles will tell you how long it takes. Usually around 8 minutes or so. If you want you can pull a noodle out and try it, if it's too hard it needs more time. Be careful to not burn yourself though so run the test noodle under some cold water first. Also, stir the noodles a little bit bc if they reach the bottom of the pot and stay there they can get burnt. When the noodles are done to your liking take the pot and dump it all in a strainer which you have put in the sink. Once you are satisfied that the water is gone, you can dish the noodles on to plates.
Sauce: Buy some ground beef and throw it in a pan. You might want to spray the pan first with some vegetable oil or something. When the meat has minimum pink left (I prefer no pink but you don't want it to burn), throw a jar of spaghetti sauce in there. Once the meat is cooked just turn the heat down so you don't burn the sauce. You merely need to keep it warm. Stir it up.
Now when the noodles and sauce are both done (ideally you finish them both within a couple of minutes so start the noodles then work on the sauce) you put the noodles on a plate and then put the sauce over the noodles. It's really easy, trust me.
Now further to that if you want a real treat you can get a loaf of those premade garlic breads. You just throw those in the stove and follow the directions but they are delicious with your spaghetti.
If you are having a lady over make sure to buy a bottle of wine.
That's it. If you have any questions just ask.