WIBTA for taking a vacation by myself and not bringing my partner?

I’m 24f & my bf is 25 (I don’t use Reddit a lot so sorry if this looks like a long brick of words)
Ill try to make it as short as possible

We’ve been together for 5 years, our relationship for the past 2 years hasn’t been great but we still love each other
He struggles with money & doesn’t have a car or savings, this has been a big issue because I’ve tried dozens (yes, dozens.) of times to help him, even wasting my own money to try & build his savings. However after 5 years he still lives paycheck to paycheck, even after moving us into my mom’s house for cheap rent because I couldn’t keep supporting the two of us in an apartment since he quit his job just a few months after moving into the apartment.
We have loads of other issues but I try to love him as much as I’m able
Here’s the main problem;

For the past 5 years we’ve only been on 1.5 vacations. Yes we’ll go on a day trip within the state to a concert here and there because we’re in a small town that’s 5 hours from civilization (lol haha) but those are more stressful than relaxing, and we haven’t even gone to one in almost a year
Problem is; I’ve been wanting to go to Vegas (literally the cheapest place I can think of) for Valentine’s Day, I’ve been bringing this up since early fall & he keeps agreeing it sounds fun, but when I brought it up the other day he said he couldn’t make it work, even if we split the costs.
I’m hurt, because before our relationships I used to travel 2-3 times a year for conventions & just to see friends, but I’ve been stuck in this small town for 4 years with no friends or support system, a diminished bank account, and a partner who’s too broke to travel.

We’re not in the greatest spot in our relationship right now, & I think I’m just angry and resentful but WIBTA if I just went by myself?
Ideally I would choose a friend or two to bring but I haven’t been able to make any after moving to this town in 2019, and all my acquaintances are coworkers or like almost homeless so it’s not like they travel
I would bring BF but I already foot the bill for our day trips and literally every other “fun” thing we do and I don’t want to this time because Im resentful & tired of him getting to have fun and freeload on my expense when I get absolutely nothing in return.

This would require me to dig into my separate savings and yes it would be way more expensive than with two people but I’m tired of putting my life on hold and not doing anything fun because I’m waiting for him to afford it.
Yes, it would also put my savings in a ditch but I’m able to make it back quickly since I do freelance on the side along with my job & unlike him I actually add to my savings.
Part of me knows it’ll be boring with just myself, & I would feel guilty & extremely sad, but I need to do something like I’m going crazy. I just want to enjoy the rest of my 20’s while I still can, since I’ve spent the first part of them just making sure our bills were paid & working constantly.