Relationship issue

Hello 

I am wondering if anyone has had a similar experience. I am diagnosed with High Functioning Autism and I have been with my partner now for around 4 years. An issue that I note that occurs is that I suddenly lose interest in my partner and has me thinking I no longer want to be with them anymore. This can happen seemingly out of the blue but I think a lot of it is to do with being bored. I don’t talk to my partner about it because I don’t want to hurt his feelings, I just wondered if this was to do with my autism. 

i also note I have this with my obsessions in that I would be interested in one thing, and then suddenly I get bored and am no longer interested. So I think this might be related to my relationship somehow. Has anyone else had this experience with their relationships? Any advice would be really appreciated 

many thanks