Hey Sabine! I relate to some of the anxiety you're having about people leaving you on read, or feeling like expectations are not being met. Like what Mo said, managing expectations can be generally really challenging, but also really important when navigating online relationships. Try to keep in mind that even if you don't end up falling in love with someone, you could develop a really cool friendship, or maybe reconnect way later down the road - you never know what could happen! Everyone's going through their own stuff, especially during a pandemic, so trying to not take things personally can make online dating a lot more fun and a lot less pressure-full.
Putting less pressure on other people also means putting less pressure on yourself; even if you do go out in Austria, meet someone, and then you need to break it off later because you're going to the US, that's okay. Relationships come and go! Again, it could remain a friendship, even if you can't see each other often. Sometimes my insecurity comes up with excuses why I can't go see someone or text someone, like that I don't know if I can follow through with living up to THEIR potential expectations so I shouldn't reach out at all. It takes practice to know when my insecurity is being tricky and holding me back from connecting with people out of fear, and when it's a legitimate desire to not be in relationship with someone. Sometimes it's both, or something else entirely! You can't really know what will happen til you try, and trying and learning from something that might be painful or hard is better than never trying and experiencing that at all. Does that make sense? Trusting in the path the universe has for you is essential here.
In terms of reminding yourself to reach out to people - it could be as simple as setting an alarm on your clock for every Tuesday and Friday, or any other days that work for you, to text a friend and just say, "Hey! How are you doing?" That can be an awesome way to let people know that you want to be in relationship with them. You could even be really honest with your friends, and say, "Hey, I'm struggling with connecting with friends at the moment, but I like talking to you a lot. Do you think you could try to text me every now and then to check in? That would help me feel like I can reach out to you, too!" It can be vulnerable to let people know that you're struggling, but it can also make friendships feel deeper and more authentic. What do you think?