Myself..

Okay, if you've been fine as a single for that long and woke up feeling blue, just randomly out of the blue like that, I wouldn't put too much into an emotional reason around your circumstances. I would look into a physiological explanation first. Could be anything: hormones (thyroid is a big culprit, insulin might be causing hypoglycemia, menses ...), stress at work/school/with family, poor diet, a virus like a cold or the flu, more exercise, more sleep, better sleep (if you're prone to sleep apnea, for example), more sunshine, more vitamin D if you've been missing too much sunshine.

Some of these you can eliminate easily, by going outside for some vigorous daily walks in the fresh air and sunshine, for example. Eating more fresh fruits and veggies (whole, not juiced.) Putting away the electronics for an hour or two before bed and making sure you get at least 8 hours a night of undisturbed sleep.

Others, you might want a doctor to look into. If you've been under stress, your endocrine system might be affected. A glucose tolerance test and a blood test for hyperthyroidism could eliminate two other possible causes. There is a gizmo for testing for sleep apnea, if that's a problem.

Any possibility that you could be pregnant?

If these don't work, then look into making larger changes in your lifestyle to make it more enjoyable and less lonely.

Remember, as with grief, this will pass. You just have to go through it first.

Thanks for the reply and advices. And no I'm not pregnant loll

Probably something about the chemical imbalance in the brain seriously this whole "love and loneliness" for no legitimate reason is mostly just a bunch of chemicals in the brain and oxytocin and heeey a fellow psychologist!! -points double index fingers- best to consult a biological psychologist in my opinion.

Exactly! Something that shows up out of the blue like that ... it needs someone who can help navigate the body like a physician, as well as understanding psychological responses.

Thank you everyone for replying back and will do ;)