Mal.Daydreaming while trying to study?

Hi everyone, has anyone had maladaptive daydreaming tendencies while they've been trying to study? I am doing a degree and seriously cannot stop fantasizing and I have big things due in two days. I think the anxiety about that is making it worse.
My daydreams are of being a particular guys girlfriend and I just imagine all the scenarios we would be doing together.
A past psychologist of mine told me I have this obsession because I hate being alone and it's my coping mechanism. He's right. I feel like the stress of exams PLUS loneliness would be too much for me to bare, and also when I'm not imagining I feel depressed and can't bare that either.
Obviously I have to stop it as much as possible, but it's very hard. Has anyone successfully done it? I seriously can't go 60 seconds without daydreaming. I've failed a couple of subjects from not handing things in on time from daydreaming instead. Yikes!
Any advice or shared experiences?
Thanks

"maladaptive daydreaming tendencies" made me smile. You wouldn't be the first student to think of girls all the time instead of homework

One technique I use is to address my thoughts directly and ask them politely if they could please go and sit down and be quiet for half an hour. That half hour I work, and then I ask the thoughts to come out for ten minutes and take any space they like.

My thoughts are usually just anxious that I'm ignoring them