Indecision : listener question

Dear ClareI wonder if you could shed some light on the area of indecisiveness. I have been in a relationship for around 18 months  and for about the last 6 months am unsure whether to continue with it or not. I seem to change my mind on this constantly. It’s a push pull feeling and I watch my mind go back and forward with the dilemma. I am going around in circles and I feel like I am 50/50 and unable to decide. It feels quite unfair on my partner as he can sense me pulling away or having cold feet about our relationship and then other times I am open and loving -  understandably it’s confusing and difficult for him to be in a relationship with someone who’s not sure about him.   I’d be really grateful if you could speak to what’s really going on here around being stuck with indecision.Thank you Clare