Has anyone experienced this before?

Lately I have been forcing myself to do the compulsive thoughts also my therapist said I’m “desensitized “ (becoming less emotionally reactive or less sensitive to something over time. ) and Today I experienced a lot of intrusive thoughts and confusion about my sexuality and feelings. I kept having images and daydreams involving girls/masc lesbians when I want my boyfriend to automatically show up or when I see cute relatable stuff about couples on instagram . When these thoughts appeared, I noticed strong body sensations like warmth, tight chest, “fuzzy” , or that feeling like that warmth when I’m with my boyfriend like that cuddly warmth feelings that felt very real and convincing and earlier i wanted to daydream about him while i try to sleep but i was worried if he’ll be a girl do k imagine me and my friend talking scout cute earrings and I kissed her? But it’s like I didn’t plan it and I got that warmth feeling in my heart like I just imagined me and my boyfriend kissing and it felt so convincing and I’m like so confused because I didn’t have that panicky feeling but I did cried because it felt so real but it’s like I don’t care . Sometimes I wonder did I really think that? After noticing the sensations, I started checking and analyzing them, trying to figure out what they mean (for example: whether I am bisexual, lesbian, or if I truly love my boyfriend). I also compared sensations between thoughts about girls and thoughts about my boyfriend to see if they felt the same or different. Even when I try to move on, the thoughts sometimes come back and feel real again, which increases anxiety and doubt.and makes me question my feelings for my boyfriend. I am struggling with uncertainty and trying to understand whether these experiences are intrusive thoughts or real desires. I feel stuck in needing certainty about my identity and feelings.