I really like my TA, and I’m not sure if he’s interested

So I talked to him again today, for about 2 hours. We sat next to each other and my leg was touching his, but he didn’t move away, so that’s good, right? I also tried that thing where you’re supposed to mirror the other person’s movements. Again, we talked for quite a while, and he didn’t mention a girlfriend or anything like that, not even once. Also he seems not to have a problem with being close to me. If nothing else, I sense that he is comfortable around me, but I really hope it’s more than that. God I hate being patient! 😛

*Sorry for the long-winded essay, but I need to make sure I haven’t left out anything relevant to my situation.*

I’m dating a grad student who expects to get his PhD by the end of this academic year. I have absolutely NO idea how much work this requires, since I am still an undergrad (a junior). But I barely see him as it is (we went on our first date 4 months ago, right before summer started, and we’ve only had about 3 dates total). There were legitimate reasons for this though. He was my TA until Mid-May, so I had to be very mature and respectful about my interest. I asked him out after I turned in my final exam for the class, and we went out 3 days later. Also, we’re both originally from other cities, so over the summer after we both went home, we’ve had to really strive to see each other. Now that the school year has just started, we’re still trying to figure out work/school schedules, and that last time I saw him was mid-August. I really would like to see him more often (once a week if he could manage it, if not, I guess I’d understand. As long as I know he’s not making excuses.) I just don’t know how to avoid coming off as clingy or desperate.

I’m willing to adapt to his schedule, because I don’t want to jeopardize everything he’s working towards by being too much of a distraction. I really like him, and I can see the relationship becoming serious, but I just can’t get emotionally invested if I only see him once a month, because then I’d feel used/neglected/confused, and my self-esteem would probably take a hit.

I’ve never been sexually active, and I’m not sure whether or not he’s figured this out yet. There are things I’m still naive about, and on our 3rd date I accidentally sent some mixed signals and he probably made assumptions about my sexual past, since it’s slightly unusual for a 21-year-old girl to be sexually inexperienced in our society, but he was respectful and mature when I explained that I was uncomfortable with the situation.

I hope that this isn’t a deal-breaker for him (it’s not like I’m waiting for marriage or anything, just a solid commitment), especially since we’ve already overcome the initial awkwardness of the former teacher/student relationship, and also the age gap. He’s 11 years older–but before you zero in on that aspect, please hear me out–I’m 21, but I’ve always felt about 4 years older than I am. My parents are 13 years apart, so in a sense, it’s what I’m used to. I’m responsible, I don’t get wasted and waste my time partying and associating with crude, obnoxious college guys. I’ve always had my priorities figured out, and I don’t want to waste my time with guys I don’t feel any connection to. I have a lot in common with this person that I am with, and I’ve had to be patient in getting to this point with him. I enjoy having thought-provoking, intellectual conversations with him instead of being with someone who has a compulsive need to punctuate every sentence with a perverted joke.

This would be my first serious relationship, and so far it has been the total opposite of what I’m used to. Maturity is a major determining factor when I’m looking for a guy. I’ve dated only twice previously, both when I was 16, still in high school, and the guys were my age. I realized that I want something more substantial from a relationship. I’m looking for a committed guy, not an immature frat boy type. I figured going for someone significantly older would be a challenge due to a disparity in experience level, but I figure it’s a nice improvement from perverted, sex-obsessed teenage boys.

I know that this relationship is still in its infancy, but I don’t date someone unless I can envision a future with them, and I can really see this going somewhere. I think he feels similarly, because he’s very thoughtful and he remembers random things I mentioned to him from months ago. On our last date, we went to a nice place for dinner, and he ordered something vegetarian so we could share, which was really unexpected and nice. It’s the little things like that, which make me think that he’s interested, however, there are 2-3 week periods where we have little to no contact. So I guess I’m just a little confused. We talked on the phone last week, and he apologized for not responding to a text, because he was doing lab research. Maybe he’s not a texter, I can’t be sure. I may just be comparing and contrasting too much with my past boyfriends.

I’ve asked all of my friends, my parents, and have been browsing forums similar to this one, but no one’s situation is similar enough to mine. I just need advice. HELP!