I Am Easy to Get Along With

Just seen my husband's (for now)- new girlfriend. I was going to smile, nod - maybe not so much of a hello but hey, why not? There is no ill feeling towards her, she may in time be introduced to my children and as an amicable person I would like her to see this and that I don't have a problem with her being with my ex.
Unfortunately though she didn't look up from her phone. I am reasonable and easy to get along with despite circumstances. I hope she realises this and that I'm not going to be the ex from hell - though I could be :)