I'm not familiar with the furries culture, so I may have no business responding to you.
mile:
At the heart of what you are both doing is role-playing. I guess I would start there in examining your feelings and trying to put them in perspective. You are enamored with Sen, someone who admits in your texting exchange that he has "a hard time with ...[his] feelings,"so I think that is a red-flag for YOU. You just may be enamored with the role he likes to play and know nothing of his true self. Maybe spend some time reflecting as objectively as you can on past communications you have had with Sen and see if there was anything truly illuminating about his personal life. How much has he really let you in?
I think
dfiant makes a wise-call that Sen is probably in a straight relationship.
For me, a person's eyes are the window to their soul and heart so without that way of "reading" someone, I would be very cautious about what I would let my heart "feel" without a face-to-face meeting.
If this emotional attachment to other players is a recurring pattern for you, I would use it as something to be aware of in future rping relationships.
I think
Nick9 makes a very good observation about friendships. Some guys are only "looking" for a bf and have no time or interest in developing actual friendships, to talk about something other than that they are horny or they
want a bf. How many posts do we read here about someone who has fallen for their straight friend? I just wonder sometimes, as well, what does friendship really mean to these persons? I just think you have to have other goals in life and you need a wide variety of people in your life to enrich, enlighten and challenge you as a person. I think it's important to also realize that if you want a bf who is "everything" in your life, you are setting yourself, your future partner and the relationship up for failure. Maybe spend a little time reflecting on what you are seeking in these relationships?
As far as Chris, only you know the personal details of what he told you and how they relate to your comfort zone. But, you need to be honest with him because, look how you are feeling right now about Sen, and your emotional pain; so use that knowledge to deal as kindly as you can with Chris.
I'll be very honest with you, the first person I opened up to about my suicide attempt was someone I had a crush on. The person basically didn't respond at all and it really effected me for a time there and just compounded my shame. So please, I can't stress enough, use what you are feeling now to help you deal with Chris in an honest yet kind manner.