I'm also a fan of shakes for nutritional supplementation! It 'can' be such an easy fix...
My son also did the tube, every night for over two years. Like Maya said, it took him just a few days to get the hang of the insertion, by the end of the first week, it was no problem at all. And, during the two years, I did give him the option of drinking shakes but he always said he preferred to just have it overnight through the tube. It helped that when he was diagnosed, exclusive EN was presented to us as THE treatment (with only vague mention of steroid option) and we weren't offered shakes - just the elemental formula with him learning to insert the tube nightly. Believing we had no option, didn't leave us much choice!
I remember, at the time, feeling strangely like I'd been railroaded into a treatment but not knowing why I felt that way. But, in their greater wisdom, I'm now grateful it was approached that way.
If there's any way you can ask your daughter to try for just one week, she may come to feel the same way Maya's daughter and my son felt - easier than drinking! (If you do try, be sure they give her a small size tube, 6Fr! If it's too large, it'll be difficult/painful and will convince her it can't be done!).
If the tube is 'no go' at all, and drirnking the shakes won't work either... Boost also sells fruit beverages. My son drinks them once in a while and he says they taste like juice. He's also always been very picky but likes juice, so these were an easy sell. I've also seen nutritional puddings (I believe Boost makes them??), we haven't tried them but might be an option for you. Also, if you google Boost recipes, they have a site with recipes that use Boost shakes (I'm sure you can use any brand). Lots of the recipes are smoothies but there are some baked goods and a few other things.
I've also found that my son has some anxiety with any symptoms (crohns or not). I think they also come out of this with a 'once burned, twice shy' feeling...
It doesn't usually affect him on a day-to-day basis, so we've never seen a psychiatrist or therapist. But, when a test is needed or if I want an 'extra' test because of results, etc., I just talk to him about it very matter-of-factly, acknowledge he has crohns, discuss 'concerns' as if 'hey just a part of routine life, and need to be followed-up but that following up doesn't indicate strong concern. (I hope that made sense??)
Some of his liver numbers were off slightly at his seconpd last infusion. After researching, I read that alcohol can affect the numbers within a 24 hour period. So, before his infusion last week, a few days before, I told him his liver numbers were slightly off but, anyone tested every 6 weeks is likely to have fluctuating numbers. I wanted to be sure all was good and explained he couldn't have a drink for 48 hours (not a single beer after a hockey game, etc.) so we could have a clean test. He asked if I thought there was a problem but I just said 'no, but why waste labwork by leaving the same questions'... Perhaps he worries but doesn't show it but, keeping conversations very bland and short seems to help.
Also, my daughter (no crohns) had lots of anxiety in high school about tests, exams, etc. She'd literally be itchy all over, break out in hives, become emotionally overwhelmed, etc. She met with a psychologist for a few months and it helped immensely!! I don't know what the dr told her but, whatever she did, my daughter truly entered university a different person. She managed all exams, etc. with nothing more than the usual stress anyone would feel. With a bit more time, your daughter may start to instinctively use the skills her dr is showing her.
And, yes, you also need some time!!! Try to give yourself a bit of 'me' time. For me, a hot bath, with relaxing music and a book always worked wonders! I think, a 'routine' also became a mindset and, regardless of the situation, the bath immediately gave me relief. And, yes, candles, bubbles and wine help!