Honestly, the two of you are not in a real relationship yet, as you have not met in person. I know you feel close because you talk and IM, but this is not a real life interaction. If your friend is into modeling for art, this is her choice and business. She will be doing this for years to come, and it sounds like you want to date someone who is a bit more conservative in that way.
Ultimately you have to ask yourself what the goals of this relationship are. Are you going to drop everything and move to her city? If not, I suggest you spend time with women in your town. Not that you cannot be friends with her, but it is not a relationship until you start spending time together in person. It does not sound like this is a firm plan for either of you, and she might not consider this a relationship. After all, what do you really know about her? She could be dating someone and just spending her free time with you on the computer.
Yes some people who meet online, fall in love and get married, but they take the online interaction offline pretty quick. Seven months is a long time to wait, and if it is going to happen, you need to try harder to make it happen sooner than later.