Should I stay or should I go

I am 24 and due to finish my masters in September. I have been with my boyfriend Will* for nearly 6 years. We met on the first day of uni and the rest is history. We have had a few rough patches where we have almost broken up but have always pulled through. We live in a house we brought together in September (I say we, his name is on the mortgage but I provided 100% of the money for everything) We own a puppy together (once again the dog is mine- all paid for by me and I brought him for uni purposes) We live in our uni small city/town in the midlands which is lovely and quaint just boring as hell. I have been here 6 years and starting to get very bored. I brought a house here as it is very cheap and at the time I brought it, I though I would stay here for a while. In the past year I have lost 4 stone in weight and started to live life again after spending two years after uni plodding along smoking green and being miserable. I am now ready to start thinking about my future and what I want to do. Will got a fantastic job straight after uni, this was difficult as I couldn't find a job I wanted in this area and my family live on the south coast so felt like I was settling here for him but over it now. (still have not got a job 3 years later but its all good) I have spoken to him about leaving but he has no intention of leaving his job/location. I finish my masters in September and turn 25 I need to decide whether to follow my dream and live in London for a few years or to stay here and try and make the most of the slow life with my perfect little family (dog, house, doting boyfriend) hah I feel crazy even thinking about leaving my boyfriend and comfortable life to do something which i am sure will not be as great as I think but the though of it scares me. I have not been scared since the first day of my travelling trip and I miss this feeling. I love my boyfriend very much and worry if I were to leave him I would regret this decision and throw away the chance to get married etc. I have been thinking about this on and off for a couple of years but don't have the balls to break his heart. also have a house and puppy to consider. Should I stay or should I go? (sorry for longest ramble I j feel like I had to explain everything to make sense, also sorry if I come across as a selfish, heartless bitch, Im not I promise) Thank you :)

It's hard to offer advice as it's always a gamble, right? If you leave, there's no guarantee you'll be happy (and you risk losing what's keeping you happy right now - the boyfriend, the house, the dog). Then again, you're also young, and there's a lot to be said for pursuing your dreams even if they don't work out. (As you're young enough and resilient enough to bounce back.) Would it be possible to take a moderate course? (Maybe one where you applied for jobs before moving to London? Or perhaps where you moved to London, but maintained a long-ish distance relationship with your boyfriend, where you talked daily and came back on weekends?) I guess I'm hesitant to recommend just up and moving (since your life sounds pretty good and you really might go to London, find no work, no nice people, then come home in 6 months to also have no good life at home). But then I'm also hesitant to recommend staying as you only live once, you're young (if you were 40, I'd tell you to stay), and life is too short to feel like you gave in to second best.