"I will admit that at the time I wasn't thinking of the other women and how it would make them feel, and I'm sorry for that, but I can't blame Courtney for going out of her way to spend more time with me -- that's why we are all here," The Bachelor star wrote on his People blog.
"I try to focus on all these relationships singularly. It's odd to date more than one woman and in order to do so, you have to try to treat each one individually. If I were in Puerto Rico with a beautiful woman I was dating and she wanted to skinny dip, I would be a fool to decline. I treated this situation the same way."
While Flajnik wanted to spice things up with Robertson and take their relationship to the next level, he chose to no longer pursue connections with bachelorettes Jennifer Fritsch and Elyse Myers. However, the reality TV star said sending Fritsch home was extremely difficult.
"Saying goodbye to Jennifer at the rose ceremony was excruciating. We had such a fantastic date in Park City [last week], but as my relationships with the other women were taking off, I knew in my heart that I wasn't going to end up with her," Flajnik explained.
"More than anyone else here, I didn't want Jennifer to invest any more of her feelings in me. She is so incredibly kind, and wears her heart on her sleeve, that I didn't want to risk her investing any more emotion in our relationship when I knew it wouldn't be forever. I will always remember Jennifer and the sweet time we shared together."
Flajnik's decision to eliminate Myers during their one-on-one date was apparently much less heart-wrenching for The Bachelor star, as he came to the conclusion the bachelorette was more into finding love than she was really into him.
"I feel Elyse is looking for a husband, but not necessarily me as that husband. I really tried to keep an open mind on my date with Elyse. I think she is a beautiful woman and I love that she risked a lot for the chance of finding love. I respect that type of commitment, but I also had to listen to my heart. I wish I had explained myself better to her on the beach," Flajnik said.
"It's hard enough as the Bachelor to know what a woman's true intention is, and to hear her talk about 'not wanting to be single' made me doubt if I'm really what she's looking for. I think she is more in love with the idea of being in love and I knew we weren't headed to that place and I didn't want to lead her on. Elyse is a great woman, and I really want her to find a guy that is right for her."