Hi All
Thank you so much for all the responses and advice - I honestly did not expect sdo much feedback 
The funny ones made me laugh, the accounts about running ultras helped me put things into perspective a bit more and the ones about similar experience made me feel less isolated with this problem.
I have managed to identify that the root of the problem is how my exercise regime impacts the amount of time I can spend with family. In particular, with my hubby, as some of you have guessed correctly! Our difficulties started to arise from the fact that we did not live together before we got married (I know this is shocking, we are the old fashioned type!) and these things started to emerge only once we started to live under the same roof. Whilst we did not live together, I came and went whenever it pleased me, I did not need to concern myself with how the other person may feel about me not being around at certain times.
We did have a lengthy convo last night about this and managed to establish a good way to tackle this going forwards - we will agree in advance when we wanna do something together and I will schedule my wourkout around that rather than letting my workout schedule dictate everything else. I still do not believe that I am "obsessed" but I appreciate that someone who does not exercise much (like my hubby and all my other family members) the amount I do may seem a bit too much for them.
What I have learnt from this is that it is all about understanding what the real issue is, know what is really important for you, work out some solutions together, compromise when possible, and keep communicating in an open, honest and non-judgemental manner.