DP and I are in our late 30s and have been together for around a year and a half. We moved in together just before our 1 year ‘anniversary’. Prior to meeting one another we’d both had numerous long term relationships and had both been married, so by the time we met we both knew exactly what we did and didn’t want from a partner/relationship.
We both feel that the relationship is genuinely like a breath of fresh air and completely different to any relationship either of us have been in before. We don’t argue, but calmly talk through any rare disagreement we have and appreciate and understand each others point of view. Everything house work related is shared evenly with no complaints or nagging, we respect and support each other with everything and most importantly we just love each other’s company and being around one another.
Caught up with a friend for a coffee the other day and she had asked about the relationship, so I’d essentially told her the above. Father than be happy for me, my friend claimed that all relationships are this easy at the start and I’m just in the honeymoon period, soon it’ll be boring and stagnant and the arguments will begin. In my experience, I’ve always started to see the negative traits in partners by at least 6-12 months and various red flags, so I feel any major issues would have already presented themselves by now. Friend says I’m deluded! AIBU?! 
Would be interested to know how long your “honeymoon period” lasted, or did it never finish?!