well exercise is good simply walking however far and wherever youy feel comfortable
try to go to bed at the same reasonable time every night and wind down, maybe a bath, milky drink and hot awter bottle ..window slightly open to keep the room from being too hot.
If you can conccentrate and feel it is difficult to get to sleep and you don't have other ideas then read something holiday reading ish
don't stress if you wake up in the night and can't get back to sleep
if you are awake make yourslef a drink and then go back to bed quite quickly
rmember that resting is good even if you can't sleep
try some visualisation exercises
avoid coffee and stimulants and alcohol too
have breakfast..porridge or muesli is good, banana and natural yogurt or scrambled eggs
plenty of fruit and veg
lunch and dinner at sensible times
make a list of things that you need to do and tick them off so that you don't keep struggling to think of all the things that need doing
prioritise and put anything which isn't important on the back burner
identify something which gives you pleasure and make some time for it
talk through any issues with your bf but only when you both feel up to it..maybe a relationship counsellor could help