Worst timing ever: He just got out of a LTR and is moving away in 3 months, help!

Basically met this guy: ONS turned into something a little more.

Context:
Once he finishes his university degree in Sept he moves back to England.
He just recently got out of a LTR in March (4 years)-- I didn't ask why they broke up because I didn't think it would get this far for both of us.

He is currently travelling throughout Europe for a month too so I can't see him as I'm home.

I really like the guy. I won't be finished University until another 2 years so if something was to happen I would be travelling back and forth (this isn't a problem for me-- a few plane tickets shouldn't prevent you committing to someone you like, yes it will be hard)

I said we should have some fun before he travels back (I've commitment and trust issues so I always try to distance myself from guys and avoid commitment). However, I feel ready for a relationship with him.

Despite starting of as a ONS, I don't think he sees me as a ONS. We went on a day trip, we constantly keep in contact (he's texting me-- double texts even though he's travelling. I try to limit my texts so he can enjoy himself and not worry about replying). He also doesn't seem solely interested in sex what so ever.

I don't want to appear like a crazy clingy bitch trying to tie him down but I think I would also regret not saying to him how I felt before he left.

Do you think he seems interested, what has your experience been either getting out of a LTR or developing a LDR. Also, how should I word my interest?

I'm afraid of getting rejected too because he will be the first time I've ever opened up about my feelings so I'm feeling a little vulnerable.

Speak to him straight
What do you have to loose now?

If I told him once he returns he still has 2 months here before leaving. Don't want to ruin any chance of seeing him those remaining months.

Also, maybe because he recently got out of a LTR and is moving away it kind of answers my questions

It sounds like you want us to tell you to do nothing; basically defeating the purpose of this thread.
Just tell him how you feel. I don't think he'd refuse to see you again even if he isn't interested in committing.

Either way, a chance of something serious is better than 2 months than nothing.

So many acronyms. Much confusion.

Sorry, I do! I think it's just me putting up a guard and trying to persuade myself out of doing it because I've never done nothing like this.

Really? I'm not entirely sure how to even approach it? How do you bring it up? Should I wait until he returns next month or should I wait until he's almost leaving?

I suppose that's true! I did say I would regret it if I didn't say anything... how and when will be the hard part.

Maybe sooner to him leaving is better. That way you'll both have continued this relationship longer and gotten closer in doing so. No need to fret about how to bring it up, just be natural.