"Jessica I think you are a nice girl and really cool but you are in USA and Im in Europe. At this time I don't want any kind of relationship with anyone be it short or long distance. I want to be fair and honest with you right away."
Most Helpful Girl
That's a bit... well, cold. Not intentionally, I mean there's zero emotion in it. If I were you, I would say it more like:
"Listen Jess, I care about you and I think you're a great person, but we have to start being realistic. You're in the US, I'm in Europe, there's no way I can see this working and I genuinely don't have any desire to try and make it work. It isn't you, it's just what I need for myself right now, I just didn't want to lead you on, you don't deserve that and I'm not the type to lie. I'm sorry."