Spring time = broody body

Since I started dating my boyfriend in August 2013 I have noticed I always become very broody in the spring time!!?? I'm only 20 and not ready to become a mum before I finish college... But I want to have a baby..BADLY. I can feel my body yearning to carry my boyfriends baby 😫. I know it's totally unrealistic but I can't help how I feel... Anyone else get like this during a certain time of the year?