Is it normal if i feel bad for myself but not really?

I've never had that emotional side of myself come out and sometimes i just think i just dont have any emotions. Its hard for me to express myself but i do have feelings because they make me think but i immediately just keep moving on not cause i want to but cause it just happens. As a guy, i dont kno how to express myself but i would like to know especially with the girl ive been talking to for almost a year. I do like her but she has a hard time believing me and understanding that I can't commit to a relationship right now because I just graduated from college and focused to landing a good job but I still like her which is why I told her let's keep in touch. But my way of showing her that I like her kind of throws her off sometimes. I do make the effort and show her by going to see her and spending time w her. So there have been times where she's want to walk away but she also really likes me that eventually we come back together. But every time we stopped talking, I do miss her and feel like shit cause I don't have the nerve to go and run after her. I wish I did but I don't. So at the end I want to know how to express myself before I end up losing her or possibly ending up alone. Is it normal to really like someone but lack emotion therefore, I don't show how much I like that person?