Intrusive thoughts during arousal

I have been having sex or just having pleasurable fantasies that I enjoy but then I get intrusive thoughts about a person I like (not in a sexual way) and these two things mix up on one side I feel aroused and pleasurable but on the other side I feel this likeable feeling towards a friend and It feels wierd and then I get really bad anxiety how to deal with that ? Sometimes I have false attraction because of intrusive thoughts when I am aroused and ocd tells me that these are same feelings