Girl problems can anyone please help?

ok i've been dating this girl for about five months next month will be six, and when we met she had a job but lost it due to the teacher cutbacks but got one recently with a hospital taking pictures of newborns. ever since then we've hardly talked to each other and when we do its only for a short time we don't play around like we used to and when ever i tell her i love her she changes the subject quickly what is happening