Bizarre spam

Pasted in its entirety... because well, why not?

First I'd like to say how much I like your site. Recently I decided to surprise my boyfriend at work and bring him lunch. However when I was walking into the office I saw what appeared to be him "man handling" another man's back side. I quickly left without being noticed. I was very appauled at the sight of the incident.

While i'm telling myself things couldn't possibly be what they seem, none the less I am starting to wonder. While I don't think I have anything against gay people, it just made me sick to see him do this, when I thought I knew everything about him. I wonder if I was unable to satisfy him in some way that he had to go elsewhere? This happened a week ago, and i've been avoiding him at all costs, making up excuses, and the other night he took me aside and asked me what was wrong. I got out of the situation as quickly as possible saying it had something to do with the trouble my sister is going through right now. While that was partly the truth, i've come to the decision I do want to approach him and ask him what the incident was about. I do like him as a person and would be hurt to lose him intimately, but I could settle for him as a friend. I am hoping he is bisexual at worst.

Can you give me some tips on how to go about asking him? I don't want to scare him away from me. I figure you have a lot of experience in this area.