Why does my friends with benefits disappear then come back any in sight anyone?

Anonymous
I have known this guy for 8 years and we have been friends with benefits on and off for 5 years well its a weird situation we will see each other for a few months and then just stop talkin then a few months later we will start again this last time it was my fault we stopped talkin he started getting to close tryin to cuddle and he told me that he missed me well its been 10 months since I have talked to him and I seen him at the gas station a few weeks ago and we smiled at each other and said hi and nothin more was said well he messaged me last week out of no where wanting to hook back up but I wouldn't now he text me on a regular basis why does he keep coming back any in sight would help
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Some one please any advice
Why does my friends with benefits disappear then come back any in sight anyone?
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