I am sad.
I moved to France 25 years ago and work in a French university, teaching students to love the English language and the literature of the British Isles. I've sent hundreds of students to UK universities on Erasmus exchanges and seen them return enthusiastic and admiring of the UK and keen, when they become English teachers, to pass that on to their French pupils.
I've seen hundreds of UK students come to France and fall in love with the country, returning enriched to the UK.
Many of my colleagues chose to specialise in British history, culture, language, literature, etc., because they felt deep admiration for them and for the UK. They are bewildered and profoundly shocked at the retrograde choice expressed by a country they saw as open, vibrant and often at the forefront of change in music, film and writing and which they no longer recognise. "Going against the tide of history" is a phrase I've heard several times.
EU colleagues in UK universities feel unwelcome and hurt.
Enjoying the freedom to live elsewhere in the EU doesn't make you less British, no more than having a child makes you love your husband or previous children less.
It does make you more tolerant, more open-minded, more co-operative, more appreciative of how, underneath our differences, we all really want the same things for our families.
Those are values we'll need in the coming years to deal with the hugely complex issues facing us and our children. A proportion of the UK population has turned its back on them and trampled them underfoot. The things they think they will gain (sovereignty, freedom, independence, two fingers stuck up at an Establishment that has merely reinforced its power and wealth) are unlikely to satisfy them or to compensate for what has and will, in the coming months and years, be lost.
"Sad" doesn't come anywhere close, TBH.