I have a habit of liking fictional characters sexually

Okay this is a little more indept then a situation then it seems, I get crushes on fictional characters, I remember my first one being my childhood hero Indiana Jones, then it moved on to more embarrassing ones I'm gonna skip, fast forward to fallout 4 and I want fucking nail Nick Valentine the synth detective, then I played overwatch and wanted to fuck the two probably most unattractive characters Junkrat and Roadhog, like really bad.
And when ever I find a fancy I obsess about it, it's all most all I'm interested in and I just image fucking those characters or things along those lines, I've always been more attracted to characters I could relate to but it's always the weirdest ones and sometimes when I sleep with someone I image it's one of them and it gets me going like crazy, never have I become this infatuated with a real person except my ex-boyfriend, which after the mutual breakup left me to fall deeper into this fictional loving. I buy merch of the characters pillows etc. I'll draw art either normal or lewd and it's not like I'm a social outcast or spend all my time alone obsessing over this stuff, I'm very social and have a life outside of it, I'm well put together but it's my little secret I've never shared, and when I have they don't believe how seriously I think about this stupid fictional characters.
I've made efforts to lessen all of it but I'm not sure it working or making it worse. One person suggest therapy or counciling, but having been molested at a young age by my therapist I have a very hard time forcing myself to go to counciling or anything of the sort.

Is my obsession actually normal and alright? I'm I just worrying and stressing about nothing?