It can be very difficult to see where your future is headed, especially when you are attempting to determine the nature of the long term possibilities of your relationship. There are however a few things you can observe in your man's behavior that will help you understand his plans.
Quality Vs. Quantity in Regards to Your Time
With the development of a serious relationship, the man begins to understand that there is a big difference between spending a lot of time with you, and spending quality time with you. The more thought he puts into your outings, the greater the chance that he wants to spend the rest of his life with you.
Future Planning
Careers are becoming very important to both genders, and a man who is interested in marrying his girl will take a genuine interest and start subtly asking about your future plans with your job, so he can start to figure out how your marriage will work