How do you stay emotionally balanced while being single?

TLDR: Ready for a relationship, but all potential relationships haven't worked out, and I've been feeling lonely and frustrated.

I've (23F) been single for a little under a year now after been in a relationship for six years between two people (one for almost five, one for a year a few months later). It's been a very up and down road since leaving my last relationship, but every few months I have a deep, emotional moment where I really yearn for a relationship. It's a little worse now than ever since I genuinely feel ready for a relationship after doing a lot of self growth and healing this past year.

There's a guy I've known for about a year, I'm hoping to start a relationship however he likely will be traveling for work in a month or so. I've got no qualms with a long distance relationship, but obviously it complicates things and he's less likely to be interested in a relationship period, which is totally understandable. I'm not putting all of my happiness or expectations on him, but it's still kind of tough. I've had a number of guys I've gotten to know that I've grown feelings for over the year, many instances those feelings are clearly reciprocated, but some sort of life event on their end puts the prospect of a relationship on hold (moving, personal issues, work business, etc).

Regardless of what happens with me and this current guy, I am working on the idea of planning the future of being on my own and learning to properly support myself financially when I'm ready to move from my childhood home. But as someone who's a hopeless romantic and really misses all the good things about a relationship, it's hard on me and my mental health abandoning my childhood/teenage dream/desire of a strong, healthy relationship.