I suggest you read "The Game: Penetrating The Secret Society of Pickup Artists” by Neil Strauss. Not to become a 'pickup artist', which itself is a joke and a very shallow life even if one were "good at it". No.
However, there is a chapter or two, I can't remember how much but it could have been half the book, about self-actualization that I thought was very useful. About making your life full, so that you have a rich background of things you enjoy doing to bring people to.
It's been forever since I read it, but it's an interesting read, especially when Courtney Love is being den-mother to a houseful of pick-up artists in training. Neil Strauss can tell a story. He also wrote a biography about living with Mötley Crüe that is pretty depraved.
Not acceptable. I don't know laws in the UK but that person should lose their job. Workplace harassment is a serious offense, as you are REQUIRED to be there, so your employer is required to provide you with a safe, harassment-free workplace.
Keep evidence, keep everything, report everything, and keep doing it. Keep personal logs of who you talked to and when, what was said, even if there's no other record. It's possibly going to cost you your "team member" status, but that's what the harasser is counting on. They are sadistic, and they're going out of their way to make your life miserable and endanger your job and peace of mind.