I've recently been diagnosed with possible Bipolar disorder and OCD tendencies (When I have thoughts of hurting people or hurting myself I need to act on them or else I think I'm going to go insane) Anyway, recently I took a liking to a girl, sent her poetry, bought her gifts etc. Then I snapped, said she was using me for self personal gain and never wanted to talk to her again, I don't even feel bad currently but my mood has fluctuated from depressed with suicidal thoughts to happy that I got rid of her. This occurred within 15mins of being nice and sweet to her. I was wondering is this common when liking people, has anyone else experienced this issue?

(I was diagnosed 4 days ago and I am unmedicated)