What's scaring you about your relationship right now?
From what I'm getting, I think its best to talk about your fears and getting over them, because they are affecting your sleep.
Overthinking is a bad thing, and it's a problem that I'm dealing with.

How long have you been with him?
Ask him for reassurance, maybe? It sounds clingy, but its something that should totally be fine to ask.
My relationship wasn't too easy because we only saw each other at most once a week, and there were tough moments where we feared we might lose one another. But asking for comforting words really helps.
IMO, don't hide that you're scared.

Okay so you're definitely worried and have things on your mind, which is causing you to not sleep.
Once you address these problems, and get answers to them ..
Your mind should put to rest.

I would just say have sleeping pills, but they really aren't the answer ha.
A routine helps too, like a long relaxing bath .. abit of reading or something.
Something to wind down, a clean bedroom helps alot aswell actually.

I'm an insomniac, I probably get about 1 to 2 hours sleep every night, doctor put me on sleeping meds but they really didn't work..

Try journaling? listening to music before i go to sleep helps me sometimes, too. also like Hipster said, talk to the other person.

any reasonable guy won't find that obsessive. and you're on a relationship, don't be afraid to share that things aren't going well with your self.

It doesn't sound like you're an insomniac, but it wouldn't help to get it checked out. I'm an insomniac, nothing really works. Some weeks I'll sleep ok. 4-5 hours a night. Some weeks I can stay up for three days or so in a row. Without sleeping. So yeah. Get it checked on just in case.

As Hipster has said, you need to sort out the issue with your long distance relationship. Are you scared it's going to end? Are you paranoid about them doing something, or? It's common to loose sleep over something you worry about, and unless you address the problem it's not going to go away, unfortunately. Ask him/her, just to get some reassurance and put your mind at ease

Another thing, which I think really helps is just to really calm down before you go to bed. I used to sit up till all hours on my laptop, drinking tea/coffee and listening to music. Then, I'd simply switch everything off and go to bed. Needless to say, my brain didn't shut down for hours after and it really affected my sleep. So think about that. Maybe get a bath, relax yourself, read a book, switch off your phone, your computer, don't drink anything too sugary or caffeine related, don't eat anything big. See if this helps

A combination of these all these factors may be the thing that's causing it.

This is good news, and I'm glad you've slept better. Was talking to him something that helped?

i get it all the time, it sucks so much. i never feel 100% during the day

As well as what Hipster's said, you should check your iron level, caffeine in-take and such. They could be factors intervening with your sleep.

I didn't really read all the post, but yea this happens to me a lot. Try like watching tv or something that you can fall asleep too. I recommend tv, since you can put on a stupid show you don't really have to watch, and internet or something, and when you get a little tired, just lay there in bed watching tv, and you should fall asleep watching it.

I advice you that you had better read some favourite book, when you get tired, you can fall asleep immediately when your head hits the pillow. i usually use that way! i hope you can sleep again. bye bye

I'm glad Don't be afraid to be open with him about those kinds of things, and for him as well.