I had the same situation with my car for about 2 years. I would prime the car by turning the key 3-4 times, then by the 5th time, I would turn it over and it would sound just fine. But then after doing that for so long it finally wouldn't turn over anymore.

Turned out it was the fuel pump that went out and needed a new one. I just had mine put in about a week ago and now my car starts right up! No more priming needed, and it sounds a lot nicer too lol.

If you a new pump and decide to get it replaced, I recommend using this video and doing it yourself to save money. I did it and saved probably over 300 bucks or more instead of paying for labor.

Its two parts so look at both vids.

Hope it helps out man