My boyfriend and I live a fair distance apart and generally only get to see each other once a week on a good week. He is always sending me adorable messages and I can never think of anything to send back. Any ideas for cute things I can text him would be amazing!
How about you not worry about being clever, and just be yourself. While you're at it, maybe be loving and sweet to him. But you don't have to worry about trying to hard at being cute, or funny or particularly witty. He likes you for who you are, doesn't he? So stick with that.
Not good enough?
Well if that's not a good enough answer, then maybe try doing things, like talking about how you can't wait to be in his arms, or to give him a big hug, or something like that. Just be affectionate. Maybe that will contribute to it. But as I said, this stuff doesn't need to be such an effort, and you really shouldn't have to force this stuff.
I think he would be happy with just talking to you normally but if you want to sent him something funny or cute then a good idea is to go out of your element. For example, if he is into sports, tell him of some the exaggerated experience you had with it. Like "you should pick me for your draft" then show some comically bad picture of you trying to play football, in sexy clothes if he is into that lol. This shows him that you are going out of your comfort zone to relate to him but it also shows your whimsical, confident, yet silly style that guys love. This was of course an example but same thing works if applied to his interests. Don't overdo it though lol, sending a message like that daily could freak him out a bit.
I'm in a similar scenario but we aren't in a couple ... yet. She lives in a neighbouring country to mine, we have very strong feelings for one another but she seems reluctant to get into a couple because she's scared of hurting us ...
For your question, how about snap chat, Skype, etc ... something where you can see each others' faces to keep the relationship going. Or even organise a nice trip together, just the too of you, something you can remember and strengthen your couple a little bit more.
Text him a sweet love quote or just make something up (also making it rhyme helps, I personally love it when a girl makes a sweet quote rhyme). If you cannot think of anything, the internet never fails. Check tumblr for cute things you might want to text to him.