UE4 Project freezing during launch (HELP!)

So, I have been working on a game for the past few weeks, and its getting hard to open the project. Basically, its a horror game, but it has a very large level. I don’t know if that has something to do with it? I have 8gb of ram, and Im wondering if that could be the problem. Sometimes the project does open though, but usually only after multiple tries. I will open it from the launcher, then It loads for 10-15 sec, then just stops. It doesn’t say its not responding, it just freezes.